Researchers have brought ancient microorganisms back to life from permafrost cores dating back up to 40,000 years, extracted from four sites within the permafrost research tunnel near Fairbanks, Alaska. They found that as underground permafrost melts, microbial activity begins with a slow “awakening”, but significant transformations in the microbial community occur within six months.
Archaeal abundance in whole samples collected from a permafrost research tunnel near Fairbanks, Alaska. Image credits: Caro et al., doi: 10.1029/2025jg008759.
Currently, permafrost across the globe is melting at an alarming pace due to climate change driven by human activities.
Scientists are concerned that this could initiate a dangerous feedback loop. When permafrost thaws, the microorganisms within the soil begin to decompose organic matter and release it into the atmosphere as carbon dioxide and methane, both potent greenhouse gases.
“This is one of the biggest uncertainties in climate response,” stated Professor Sebastian Copp from the University of Colorado at Boulder.
“How does the thawing of this frozen ground, which contains significant amounts of stored carbon, impact the ecology and climate change rate in these areas?”
To investigate these uncertainties, researchers visited the US Army Corps of Engineers’ permafrost tunnels, a distinctive research setting.
The facility has been extended over 107 meters (350 feet) and continues toward the frozen ground below central Alaska.
Scientists have gathered permafrost samples ranging from thousands to tens of thousands of years old from the tunnel walls.
The samples were then treated with water and incubated at temperatures of 4°C and 12°C (39°F and 54°F).
“We aimed to replicate scenarios that would occur during Alaska’s summers under projected future climatic conditions that allow these temperatures to penetrate deeper into permafrost,” explained Dr. Tristan Caro, a postdoctoral researcher at Caltech.
The researchers utilized water containing unusually heavy hydrogen atoms, referred to as deuterium, to track how microorganisms absorbed water and used hydrogen to construct lipid membranes surrounding all living cells.
In the initial months, these colonies grew slowly, with some even replacing only one cell for every 100,000 daily.
In laboratory settings, most bacterial colonies can be entirely replenished in a matter of hours.
However, by the six-month mark, everything had transformed. Some bacterial colonies even developed visible biofilms.
“These microorganisms likely pose no threat to human health, but they were kept in sealed environments nonetheless,” remarked Dr. Karo.
“The colonies don’t seem to wake up quickly in warmer temperatures.”
“These findings may provide insights regarding thawing permafrost in real-world conditions. It appears that after a warm period, microorganisms can take several months to start emitting significant quantities of greenhouse gases into the atmosphere.”
“This means that a longer Arctic summer increases risks for the planet.”
“While a single hot day might occur during an Alaskan summer, the primary concern is the prolonged summer season, with warm temperatures extending into autumn and spring.”
“Many questions remain unresolved about these microorganisms, such as whether ancient organisms exhibit similar behavior in different global locations.”
“There is an abundance of permafrost worldwide. In Alaska, Siberia, and other northern cold regions, our sampling covered only a small fraction of that.”
The findings were published on September 23rd in the Journal of Geophysical Research: Biogeosciences.
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Takaro et al. 2025. Microbial resuscitation and growth rates in deep permafrost: Lipid-stable isotope probing results from the permafrost research tunnel in Fox, Alaska. JGR Biogeosciences 130 (9): e2025jg008759; doi: 10.1029/2025jg008759
With emissions continuing to rise, how can we foster hope for the future?
Qilai Shen/Bloomberg via Getty Images
In the media, the climate crisis can often seem overwhelming with daily warnings about environmental degradation and extreme weather events. However, how do climate scientists cope with the relentless reality of a shifting planet? What lessons can they share regarding the intense emotions that climate change provokes? Is there a way to leverage these feelings constructively?
New Scientist Recently, I spoke with New York-based climate scientist Kate Marvel and Tim Renton, a climate scientist at the University of Exeter, UK. Both have dedicated years to modeling the interactions of our planet in response to rising greenhouse gas levels in the atmosphere. Each has authored recent works that provide insights on how to engage with and address climate emergencies.
At first glance, their books may appear quite distinct. Humanity by Marvel comprises a series of essays delving into the emotional responses elicited by climate change. In contrast, Renton’s work, A Positive Turning Point, emphasizes actionable strategies and solutions. It argues compellingly that with appropriate social, economic, and technological interventions, a significant shift toward a cleaner world is achievable.
Nonetheless, both books center around accepting our feelings about climate change, enabling us to reshape our thoughts and actions. During our discussion, Renton and Marvel emphasized why we should embrace anger, fear, pride, and hope regarding our future on this planet.
Rowan Hooper: Kate, your book discusses nine emotional perspectives on our changing planet. Would you mind starting with anger?
Kate Marvel: The chapter on anger was one of the most straightforward for me to write. I aimed to explore the historical context of climate change discovery, particularly how it intertwines with the actions of those who misrepresent it.
For example, there’s a research team striving to show that the majority of excess carbon dioxide in our atmosphere originates from fossil fuel sources, conducting innovative experiments to confirm this. They’ve deployed large ships to gather sea measurements and ultimately they’ve constructed a climate model with highly accurate predictions. Interestingly, the story traces back to an oil company, which fills me with anger. They were aware of the truths that many are just beginning to confront.
RH: Can this anger drive positive action?
KM: That’s my hope. It can be easy to fall into a negative spiral fueled solely by anger. Social media often exacerbates this outrage, but that sort of unproductive rage doesn’t lead to meaningful change.
RH: Your book also addresses emotions such as wonder, guilt, fear, sadness, surprise, pride, hope, and love. Can you share your approach to navigating these emotions?
KM: It was important for me to convey that there isn’t a singular way to feel about climate change. I often grew frustrated by narratives that insinuate you must adhere to one emotion—such as fear or anger. Living on Earth means acknowledging conflicting feelings; you care deeply about what unfolds here because your loved ones do as well.
Tim Renton examines “tipping points” within ecosystems that could impact the broader climate scenario.
University of Exeter
RH: Tim, what strategies do you use to handle the emotions tied to climate change research?
Tim Renton: My focus has been on climate tipping points that could have serious implications, some of which are already beginning to manifest. For instance, up to five billion people globally depend on tropical coral reefs that are currently threatened.
Having studied this for nearly 20 years, I’ve had to cultivate a mental framework that grapples with complex systems while seeking evidence that fosters my optimism. It’s about finding plausible pathways toward necessary changes without falling into naive hope.
RH: Is it vital to strike a balance between realism and hope?
TL: Yes, that’s what I consider conditional optimism. I remain hopeful that as people read, they might join me on this journey. History shows us that meaningful inspiration comes from a handful of committed individuals.
Madeleine Cuff: Tim, much of your work revolves around the notion of tipping points. For those unfamiliar, can you explain what that entails?
TL: A tipping point refers to a moment when minor alterations result in significant impacts on systemic states and destinies. In the context of climate change, this includes major ice sheets, ocean circulations, and key biospheric aspects that can transition between stable states. For instance, the Amazon rainforest could shift into a degraded forest or savanna.
MC: What does a positive turning point look like?
TL: Drawing from various fields over decades, I’ve seen that social changes can reach a tipping point. Social protests can appear to ignite a revolution, and technological advancements can also lead to significant shifts. There’s a point when a new technology can effectively replace an existing one.
RH: A clear example is the rise of electric vehicles and the decreasing costs of solar energy. How do these contribute to a positive turning point?
TL: We need to focus on actions that facilitate positive tipping points. We must accelerate the decarbonization process significantly. Fortunately, everyone plays a role in this transition.
At the most basic level, adopting new behaviors like reducing meat consumption or embracing technologies such as electric vehicles and solar power is crucial. Most individuals have investment funds, so it is essential to scrutinize where these funds are allocated.
The narrative surrounding positive turning points often begins with passionate social activists and innovators who envision new technologies or those eager to create change.
In her research, Kate Marvel seeks to enhance our understanding of the planet’s changing climate.
Roy Rochlin/Getty Images
MC: Kate, while we’ve touched on the negative emotions related to climate change, what about the positive feelings? How can they spur constructive actions?
KM: I began my book with a chapter on Wonder. When you take a step back to consider our planet and how much we understand it, it’s quite astonishing. This awe can forge connections and initiate conversations.
Typically, when I introduce myself as a climate scientist, people tend to disengage. But framing discussions around wonder can invite curiosity—for instance, asking, “Did you know that Earth’s water is likely older than our planet?” This fosters engagement. Utilizing a spectrum of emotions can be an effective communication strategy.
Research indicates that positively experienced emotions can be motivating. Pride in our achievements and the fulfillment of instigating change are significant. Social science data consistently points to love—love for family, friends, and community—as a powerful motivator for climate action. We all recognize the strength of such feelings.
My chapter on hope explores our complicated relationship with it. When asked if I hope for solutions to climate change, I compare it to asking if I hope to clean my bathroom; it’s not really a question of hope but a question of action we already know how to undertake.
As Tim rightly notes, many solutions are already at hand. We are making progress but need to increase the momentum to reach that critical turning point.
RH: We must confront our emotions, right? This might explain why so many struggle to engage with the issue—it can feel too immense to face.
KM: Absolutely. I ponder this daily, yet remain confounded by its complexity. The problem stems from global industrial activity, with CO2 and other greenhouse gases diffusing through the atmosphere and impacting life globally.
It’s daunting to distill such a vast issue into something easily digestible. The significance of what this entails and the actions required can span a lifetime of work.
Many Americans express concern about climate change and wish for governmental action. However, polls often reveal that individuals believe others are less concerned. One of the most impactful actions an individual can take regarding climate change is to discuss it openly. By talking about it, we begin to realize we are not alone.
RH: What do you hope readers will take away from your book?
KM: I want readers to explore how they can resonate with their communities through shared experiences and narratives.
TL: My goal is for readers to feel empowered to act on what might seem like a daunting and insurmountable situation, instilling a sense of agency instead.
This is an edited version of the original interview conducted for New Scientist’s The World, The Universe, Us Podcasts.
What actionable steps can we take regarding climate change? Tune in to Matt’s explanation on how to transform despair into action on October 18th at NewsCientist.com/nslmag
This water flow took place on ancient asteroids over a billion years after their formation, likely due to the heat generated by melting ice, which caused rock fractures that facilitated water movement. JAXA’s Hayabusa-2 Spacecraft.
This image of the asteroid was taken on June 26, 2018, by JAXA’s Hayabusa-2 Spacecraft optical navigation camera – telescopic (ONC-T). Image credits: JAXA / University of Tokyo / Kochi University / Ricchiho University / Nagoya University / Chiba University of Technology / Nishimura University / Aizu University / AIST.
Ryugu is a CG-type asteroid close to Earth and part of the Polana family of impact asteroids.
The diamond-shaped body, also known as 1999 JU3, was identified by astronomers in May 1999 during asteroid studies near Lincoln.
Its diameter measures about 900 m (0.56 miles), and it orbits the Sun at a distance of 0.96-1.41 Astronomical Units (AU) every 474 days.
“We have a relatively good understanding of how the solar system was formed, though many gaps remain,” said Shiyoshijima, a researcher at the University of Tokyo.
“One gap in our knowledge is how Earth acquired its water.”
“It has long been known that carbonaceous asteroids, originating from ice and dust in the outer solar system, have contributed water to Earth.”
“We discovered that Ryugu preserves an unaltered record of water activity, indicating that liquid water moved through the rock much later than previously anticipated,” added Dr. Ikemoto.
“This shifts our understanding of the long-term fate of water on asteroids. The water has remained for an extended period and hasn’t been depleted as quickly as we thought.”
In this study, the authors examined the isotopes of lutetium (Lu) and hafnium (HF), with the radioactive decay from lutetium-176 to hafnium-176 serving as a sort of clock to gauge geological processes.
The expected presence of these isotopes in the studied sample was hypothesized to correlate with the asteroid’s age in a predictable manner.
However, the ratio of Hafnium-176 to Lutetium-176 was significantly unexpected.
This strongly suggests to researchers that the liquid effectively washed away lutetium from the rocks containing it.
“We anticipated that Ryugu’s chemical signatures would align with certain meteorites currently under examination on Earth,” Dr. Iizuka stated.
“However, the results were strikingly different, necessitating the careful elimination of other possible explanations, ultimately concluding that the Lu-HF system was hindered by a delayed liquid flow.”
“The most probable triggers involved the parent body of Ryugu’s larger asteroid, which disrupted the rocks, melting the embedded ice and allowing liquid water to permeate the body.”
“It was truly surprising! This impact event could be the catalyst for the parent body disruption.”
One of the crucial implications is that carbon-rich asteroids may be a significant source of water for Earth, supplying far more than previously estimated.
Ryugu’s parent body seems to have retained ice for over a billion years. This suggests that similar bodies impacting the young Earth could have delivered 2-3 times more water than standard models predict, significantly influencing the planet’s early oceans and atmosphere.
“The notion that a Ryugu-like object has preserved ice for such an extended time is remarkable,” Dr. Ikemoto remarked.
“It implies that Earth’s components were far wetter than we had imagined.”
“This prompts a reevaluation of the initial conditions for the planetary water system.”
“It’s still early to draw definitive conclusions, but my team and others may build on this research to clarify various aspects, including how our planet became habitable.”
The findings will be published in the journal Nature.
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T. Iizuka et al. Late fluid flow of primitive asteroids revealed by Lu-HF isotopes of Lu. Nature. Published online on September 10th, 2025. doi:10.1038/s41586-025-09483-0
Wildfire smoke contributes to tens of thousands of annual deaths, inflicting greater harm on American residents by mid-century than other climate change-related threats, including extreme heat.
This assertion comes from a new research paper that presents extensive modeling of the increasing health impacts of wildfire smoke on public health in the U.S.
The study, published in Nature magazine on Thursday, reveals an average annual contribution of wildfire smoke, leading to over 41,400 excess deaths—more than twice what previous research had suggested.
By mid-century, the study’s authors project an additional increase of 26,500 to 30,000 deaths as human-driven climate change exacerbates wildfire risks.
Marshall Burke, an environmental and social sciences professor at Stanford University and one of the study’s authors, states:
Economically quantified, Burke mentions that their findings surpassed other financial damages associated with climate change identified in previous studies, including agricultural losses, heat-related fatalities, and energy expenses.
Numerous studies indicate that wildfire smoke exposure results in severe health issues. Tiny smoke particles can infiltrate the lungs and enter the bloodstream, raising the risk of asthma, lung cancer, and other chronic respiratory conditions. Wildfire smoke is also associated with premature births and miscarriages.
This research paints a stark picture of a country increasingly filled with smoke. Fires in the western U.S. and Canada release smoke into the atmosphere, spreading across regions and undermining decades of efforts to curb industrial air pollution through clean air regulations.
Dr. Joel Kaufman, a professor at the University of Washington School of Medicine, commented on the study, noting, “This poses a new threat that can be directly linked to climate change. That’s the crucial point here.”
As the study suggests, wildfire smoke-related deaths could rise by 64% to more than 73%, varying by emission rates.
“Regardless of mitigation efforts, we are likely to experience more smoke by 2050,” Burke added, though emphasizing that emission reduction efforts will have long-term benefits.
Kaufman noted that over the past five to ten years, accumulating evidence indicates that wildfire smoke is at least as detrimental as other forms of air pollution.
“We previously assumed wood burning was less harmful,” Kaufman explained. “These findings indicate that wildfire smoke could be more toxic,” particularly when wildfires consume structures, vehicles, and other human-made materials.
Kaufman highlighted that earlier this year, the Los Angeles fire started from a burning area, but much of it involved homes and plastics, which created “another toxic mixture.” The new research does not differentiate the sources of future wildfire smoke.
The implications of this research could influence public policy.
Dr. John Balmes, a spokesperson for the American Lung Association and a professor at the University of California San Francisco School of Medicine, expressed that this new study could serve as a “counterargument” against such actions.
The proposal to withdraw these findings is currently undergoing a lengthy regulatory process that is open to public commentary. Balmes mentioned that he referenced the study in a letter opposing the EPA’s proposed changes.
“It reinforces our claims regarding wildfires tied to climate change and their associated public health consequences,” Balmes stated.
The White House did not respond to requests for comments. The EPA stated that the administration is “committed to reducing the risks of catastrophic wildfires,” prioritizing strategies such as prescribed burns, fuel treatment, and debris cleanup to prevent these events.
“The EPA welcomes all public feedback on its proposal to rescind the 2009 danger findings until September 22, 2025, and looks forward to hearing diverse perspectives on this matter,” a spokesperson noted in an email.
In a novel study, researchers estimated the annual excess deaths attributed to wildfire smoke by comparing three models: one that assesses climate change’s impact on fire activity, another predicting changes in fire activity and smoke dispersion, and a third quantifying health outcomes from prolonged smoke exposure.
Researchers used data from 2011-2020 as a baseline to forecast future conditions under various climate scenarios, utilizing datasets that included all U.S. deaths within that period, both satellite and ground-level data on smoke dispersion, and global climate models.
The study assumes that people will take similar protective measures against smoke exposure as they do today.
This study has its limitations, as it primarily relies on a set of models to draw national conclusions. It does not track individual deaths linked to smoke exposure or catalog their health effects.
Results from this study were published alongside another study in Nature that employed a similar methodology and adopted a global perspective. Separate research teams estimate that premature deaths due to wildfire smoke could reach about 1.4 million annually by century’s end—approximately six times the current figure.
fA few years ago, just before the first Covid lockdown, I wrote an article exploring a rather niche query. Most gamers press down on the controller, gazing at the characters on their screens as they look up. However, controlling avatars like pilots represents a significant minority who handle their characters as if they were piloting, returning to control the plane and ascend. In many modern games, this necessitates diving into settings to adjust the default controls. Why has this practice persisted?
I figured some hardcore gamers might find this topic intriguing. To my surprise, the article resonated with over a million readers, drawing the attention of Dr. Jennifer Corbett (cited in the original piece) and Dr. Jap Munneke.
At that time, the two were investigating vision science and cognitive neuroscience, but the lockdown meant they could no longer conduct lab experiments with volunteers. The issue of controller inversion presented an ideal chance to analyze the neuroscience behind human-computer interactions using remote participants. They reached out to gamers who contributed insights into the motivations behind their controller preferences, garnering hundreds of responses.
Microsoft Flight Simulator… Many believed that being a pilot would affect control retention. Photo: Microsoft
Interestingly, it wasn’t just gamers who were engaged. “Machinists, equipment operators, pilots, designers, and surgeons — individuals from diverse fields reached out,” Corbett noted. “The variety of responses signaled a wealth of scientific literature to examine for structuring optimal research. The feedback from readers prompted us to refine how users customize their controllers.”
This month, the duo released their findings in a paper titled “Why Axis Inversion? Optimizing the Interaction Between Users, Interfaces and Visual Displays in a 3D Environment.” Why do some people choose to invert their controls? It’s a complex issue.
The study commenced with participants completing a survey detailing their background and gaming experiences. “Numerous individuals indicated that their preference for flipping controls stemmed from their early experiences with flight simulators or the first console games they played,” Corbett explained. “Many reported changing their preferences over time, prompting us to include an entirely new section in our research based on this input.”
Mental rotation… Subjects engaging in the controller inversion study. Photo: Jen Corbett
However, Corbett and Munneke, currently based at MIT, were convinced that critical cognitive aspects of inversion could only be assessed through behavioral reactions. They developed a sequence of four experiments, in which participants were monitored via Zoom. Corbett elaborated, “They had to mentally rotate random shapes, adopt the perspective of the ‘avatar’ in the scenario, judge the tilt of an object against a differing background, and navigate the typical ‘Simon effect’ when responding to targets while using a machine. These varied tasks clarified whether an individual tends to invert.”
The outcomes of the cognitive evaluations revealed that many assumptions surrounding controller preferences were indeed incorrect. “There was no discernible reason provided by participants [for inverting controls],” Corbett stated. “It was linked to their actual inversion habits. The quicker participants were, the less inclined they were to invert. Conversely, those who identified as occasional invertors were significantly slower in these tasks.” Does this imply that non-inverters excel at gaming?
In essence, gamers believe they are inverters or non-inverters based on their initial exposure to game controls. Many flight simulators from the 1980s may have conditioned players to instinctively turn themselves around. Conversely, gamers raised in the 2000s might assume they are inherently non-inverted, given that non-reverse controls became the norm. Yet cognitive testing suggests otherwise. Depending on how your brain perceives 3D objects, you may be predisposed to either invert or not.
Consequently, Corbett suggests that trying out a controller configuration you’re not accustomed to might enhance your gaming skills. “Non-inverters should experiment with inverting. Inverters should consider giving non-inversion a fair shot,” she suggests. “You might want to commit to it for a few hours. People have learned one way, but that doesn’t necessarily mean they can’t excel with the alternative. A parallel can be drawn with left-handed children who are compelled to write with their right hand, potentially leading to long-term handwriting difficulties and learning challenges.”
Through their research, Corbett and Munneke established that complex, often subconscious cognitive processes govern how individuals utilize controllers, affecting not just gaming hardware but also human-computer interfaces across various fields, from aviation to surgical technology. They crafted a framework for assessing how to optimally tailor controls for individuals, now detailed in their published research.
Learning curves… Corbett and Munneke’s research can also influence surgical practices. Photo: Oksana Krasiuk/Alamy
“This research has significant potential for optimizing inverted settings to enhance human-machine collaboration,” Corbett stated. “Many technologies blend human capabilities with AI and various machines to amplify performance. It allows individuals to tailor a specific configuration for tasks—whether aiming for a target or avoiding a mistake—such as in laparoscopic surgery.”
What began as a casual, almost nerdy inquiry has evolved into a published cognitive research document. One scientific publication has already referenced it, and interview requests have surged from podcasts and YouTube channels. What’s my takeaway? “The most remarkable discoveries for gamers [who don’t invert],” Corbett remarked:
Polar water is generated during the Martian season, which occurs due to the planet’s axis being tilted at an angle of 25.2 degrees, as explained by Dr. Kevin Olsen from Oxford and his colleagues at Latmos, CNRS, CNRS, Space Research Institute, Open University, and NASA.
This perspective view of Mars’ Arctic Ice Cap showcases its unique dark troughs arranged in a spiral pattern. The image is derived from observations made by ESA’s Mars Express, utilizing elevation data from NASA’s Mars Global Surveyor’s Mars Orbiter Laser Altimeter. Image credit: ESA/DLR/FU Berlin/NASA/MGS/MOLA Science team.
“The polar vortex’s atmosphere, extending from near the surface to around 30 km high, experiences extremely low temperatures, approximately 40 degrees Celsius lower than the surrounding area,” stated Dr. Olsen.
“In such frigid conditions, most of the water vapor in the atmosphere freezes and accumulates in the ice cap, resulting in ozone formation within the vortex.”
Normally, ozone is destroyed by reacting with molecules generated when ultraviolet radiation decomposes water vapor.
However, once all water vapor is depleted, there are no reactive molecules left for ozone, allowing it to accumulate in the vortex.
“Ozone plays a crucial role for Mars. It is a reactive form of oxygen that indicates the pace of chemical reactions occurring in the atmosphere,” Olsen noted.
“By investigating the levels of ozone and their variances, we gain insight into how the atmosphere evolves over time and whether Mars once had a protective ozone layer similar to Earth.”
Slated for launch in 2028, ESA’s Rosalind Franklin Rover aims to uncover evidence of life that may have existed on Mars.
The possibility that Mars had a protective ozone layer, safeguarding its surface against harmful ultraviolet radiation from space, enhances the likelihood of ancient life-sustaining conditions on the planet billions of years ago.
Polar vortices are produced during the Martian season as a consequence of the axial tilt of 25.2 degrees.
Similar to Earth, an atmospheric vortex forms above Mars’ North Pole at the end of summer and persists through spring.
On Earth, polar vortices can destabilize, losing their structure and shifting southward, often bringing cold weather to mid-latitudes.
A similar phenomenon can occur with Mars’ polar water vortex, which provides an opportunity to explore its internal dynamics.
“Studying the Northern Pole’s winter on Mars presents challenges due to the absence of sunlight, akin to conditions on Earth,” Dr. Olsen explained.
“By analyzing the vortex, one can differentiate between observations made inside and outside it, providing insight into ongoing phenomena.”
The atmospheric chemical suite aboard ESA’s trace gas orbiter examines Mars’ atmosphere by capturing sunlight filtered through the planet’s limb while the sun is positioned behind it.
The specific wavelengths of absorbed sunlight reveal which molecules are present in the atmosphere and their altitudes above the surface.
Nonetheless, this method is ineffective during the complete winter darkness on Mars when the sun does not illuminate the Arctic region.
The only chance to observe the vortex is during moments when its circular shape is lost, but additional data is required to pinpoint when and where this occurs.
To enhance their research, the scientists utilized NASA’s Mars Reconnaissance Orbiter’s Mars Climate Sounder instrument, measuring temperature variations to gauge the vortex’s extent.
“We sought sudden drops in temperature, which indicate entry into the vortex,” Dr. Olsen noted.
“By comparing ACS observations with data from Mars’ climate sounders, we observed significant atmospheric differences within the vortex compared to the surrounding air.”
“This presents a fascinating opportunity to deepen our understanding of Mars’ atmospheric chemistry and how polar night conditions shift as ozone accumulates.”
Mummies are commonly linked with Egypt and date back around 4,500 years. However, researchers have discovered mummies that are significantly older on the opposite side of the globe.
“We found several archaeological sites in southern China and Southeast Asia, where human burials dated between 4,000 and 14,000 years have been identified,” said Professor Peter Bellwood, co-author of the study, during a phone interview on Tuesday.
Research, as mentioned in a study published on Monday in the Proceedings of the National Academy of Sciences, analyzed 54 Neolithic burials from 11 archaeological sites in southern China and Southeast Asia. The findings include numerous samples from the autonomous regions of Guangzhou, as well as from Vietnam, the Philippines, Laos, Malaysia, and Indonesia.
Human remains were often found in crouched or squatting positions, frequently showing signs of burning. Researchers confirmed that many of these bodies had been preserved for a considerable time prior to burial during the mummification process.
Burials of partially skeletal bodies were frequently observed in pre-Neolithic sites in southern China and Southeast Asia. Hirofumi Matsumura
Bellwood, an archaeology professor at the Australian National University of Canberra, noted:
Before this discovery, the oldest known mummies were located in modern Peru and Chile, rather than in Egypt.
The modern radical smoke-dried mummies of mites bred in Jayawijaya, Indonesia, are very similar to the burials of many Neolites recorded in southern China and Southeast Asia. Hirofumi Matsumura
These discoveries have also garnered attention from leading experts in ancient Egyptian studies.
“The term has been adopted by various groups to refer to other preserved bodies, leading to a broader understanding of the concept,” stated Salima Ikram, a professor of Egyptology at the American University of Cairo who was not affiliated with the study.
“What’s positive is that the underlying ideas are similar, as these cultures aimed to preserve themselves,” she added.
The project began in 2017 with a casual conversation between the two lead authors and subsequently grew to include 24 experts.
“Over the years, we’ve gradually assembled various pieces of evidence,” said Hsiao-Chun Hung, the study’s lead author, in an email. “It’s akin to a detective’s work, where I find small clues, piece them together, and become increasingly confident in my hypothesis.”
The magnetosphere of Saturn is filled with trapped plasma and energy-charged particles that consistently bombard the surface of Enceladus. This plasma mainly consists of charged particles, including water group ions created from high-energy electrons interacting with materials from the plumes. Instruments on NASA’s Cassini spacecraft reveal that on Saturn’s inner icy moons, such as Mimas and Tethys, cold plasma irradiation results in darker reflection spectra and produces blue-tinted features on their surfaces. In contrast, the consequences of plasma bombardment on Enceladus remain largely unexplored and challenging to assess.
Saturn’s Moon Enceladus and Plume. Image credits: NASA/JPL-Caltech/SSI/Kevin M. Gill.
“The discovery of complex organic molecules in Enceladus’s environment is crucial for evaluating lunar habitability, indicating that radiation-driven chemistry on the surface and within plumes can yield these molecules.”
The Enceladus plume was first identified in 2005 by NASA’s Cassini spacecraft.
These plumes emerge from a long fracture known as the “Tiger Stripes” located in Enceladus’s Antarctic region.
Originating from a subsurface ocean, the water’s energy to create plumes and heat the ocean arises from gravitational tidal forces exerted by the massive Saturn, which deforms Enceladus’s interior.
Cassini flew through the plume, “sampling” the molecules present, which were found to be rich in salts and a variety of organic compounds.
These findings have captivated astrobiologists since organic compounds found dissolved in underground oceans could lead to prebiotic molecules, the building blocks of life.
However, new insights suggest that radiation from Saturn’s powerful magnetosphere could also contribute to the formation of these organic compounds on Enceladus’s icy surface, prompting questions about their astrobiological significance.
In their research, Dr. Richards and colleagues replicated the ice composition on the surface and along the striped walls of Enceladus’s tiger.
This ice comprises water, carbon dioxide, methane, and ammonia, which were cooled to -200 degrees Celsius.
The researchers then bombarded the ice with ions to mimic the radiation environment surrounding Enceladus.
The interaction of ions with ice components generated various molecular species, including carbon monoxide, cyanate, and ammonium.
It also produced precursor molecules for amino acids, which could support metabolic reactions, aid in cell repair, and facilitate the formation of proteins that transport nutrients in living organisms.
Some of these compounds have been previously identified on Enceladus’s surface, while others were detected in feathers.
“Molecules deemed prebiotic do not necessarily originate from subterranean oceans but can instead form in situ via radiation exposure,” noted Dr. Richards.
“This does not dismiss the potential for the Enceladus seas to be habitable, but it emphasizes the need for caution when interpreting the plume’s composition.”
“Distinguishing between ocean-derived organic matter and molecules formed through radiation interactions with the surface and tiger stripes is extremely complex.”
“Additional data from future missions will be essential, including proposals for the Enceladus mission currently under review as part of the ESA’s Navigation 2050 recommendations for the science program.”
Grace Richards et al. 2025. Water group ion irradiation studies of Enceladus surface analogues. EPSC Abstract 18:EPSC-DPS2025-264; doi:10.5194/epsc-dps2025-264
Can scientists transfer animal brains to computers? The answer hinges on how we define “transfer” and “brain.” If we’re a bit flexible in our interpretation, it’s essentially already taking place.
Caenorhabditis elegans are minuscule worms found in soil and decaying plant matter. As multicellular eukaryotes, they technically qualify as animals.
This tiny worm never surpasses 1mm (0.03 inches) in length and is one of the most well-known organisms on Earth.
We have sequenced its genome and mapped all development, encompassing approximately 2,000 cells, including 300 neurons. The variations in this worm are minimal, but what differences do exist have been mapped.
Thus, scientists could model the entire brain on a computer, reproducing not just identical reflex behaviors as found in nature, but even training them to perform new tasks, such as balancing virtual poles (and yes, that’s true).
However, even if we liberally interpret our definitions, this scenario doesn’t entirely hold up.
The C. elegans brain was not uploaded in the conventional sense. Instead, it was replicated using data gathered from years of experiments involving thousands of these worms. There hasn’t been a method to accurately record and transfer the thoughts and memories of an individual creature to a computer.
Caenorhabditis elegans are tiny worms that thrive in soil and decaying vegetation – Image credit: Science Photo Library
Many believe brain uploads represent the future of humanity, viewing it as an “inevitable consequence” of advancements in neuroscience and artificial intelligence (AI), potentially leading to the ultimate solution to death.
Nevertheless, several significant challenges must be addressed before this can become a reality.
As our conscious minds are intricately constructed from the cells and chemicals within our skulls and nervous systems, we must find a way to fully interpret our brain states in exquisite detail.
Next, we need to create a software model that can accurately mimic brain behavior at the molecular, or perhaps even atomic, level.
Over a decade ago, scientists demonstrated that it was feasible to identify neurons and their connectivity in meticulously prepared mouse brains. These brains were stained, sliced to 70 nanometers thick, and then reconstructed into a 3D format using a computer. As expected, the mouse did not survive.
Many believe that brain uploads are the future of humanity – Image credit: Aramie
This serves as an example of a destructive scan. The methods many suggest as necessary for recording a brain in sufficient detail may lead to its destruction.
As medical imaging technology achieves higher resolutions, some speculate that we could one day scan all cell states non-destructively. However, such scans must be instantaneous; otherwise, parts of your brain could be considering new things before the scan finishes.
Could this be achievable with a recently deceased brain? Scientists indicate that it might be essential to scan the brain while it’s actively functioning to ensure all cells accurately model the intended behavior.
Today’s computers are remarkable, yet even the most optimistic futurists predict we may need a century before we can simulate at the atomic scale required.
Moreover, there’s a final profound question. If you can upload your brain non-destructively in 500 years…what happens next? You would exist in a virtual world as computer software, while the original version of you continues to think in your biological form, likely with a slight headache from the scan.
But if you are still alive, did you genuinely trick death? Clearly not. Instead, you’ve allowed for the creation of virtual duplicates that could be used according to their will. That’s a disconcerting thought.
This article answers the question posed by Darcie Walsh from Preston: “Can scientists upload animal brains to a computer?”
We invite you to send us your questionstoQuestion @sciencefocus.com or MessageFacebook,Twitter, orInstagram (don’t forget to include your name and location).
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A peculiar fossil skull discovered in a Greek cave over six decades ago may finally reveal some of its mysteries. Recent analysis indicates that at least 300,000 years ago, the early Homo sapiens coexisted with the first Neanderthals in Africa and Europe.
Unearthed in northern Greece in 1960, the Petrarona skull has long puzzled paleontologists, who are challenged to place it within the human lineage.
The fossil includes traits from Neanderthals and Homo erectus, yet it was found completely isolated, lacking artifacts or animal bones that could provide context for dating.
“The moment I examined and measured it, I realized it wasn’t a Neanderthal or Homo erectus,” stated Professor Chris Stringer, a paleontologist and co-researcher at the Museum of Natural History in London, in an interview with BBC Science Focus. “It was something unique.”
Stringer has long believed that the specimen belonged to our relative, Homo heidelbergensis, a robust human species that existed hundreds of thousands of years ago across Africa, Europe, and possibly Asia.
However, without a reliable date for the skull, understanding its place in the human narrative remained difficult.
A recent study utilized uranium series dating on the fossil’s calcite coating.
Calcite, one of the most common mineral forms of calcium carbonate, forms as water seeps into the pores and cavities, resulting in new mineral structures. This uranium series dating method estimates fossil ages by analyzing the calcite and measuring the decay level of uranium within it.
The findings suggest an age of approximately 286,000 years. Nevertheless, the methodology raises questions about the skull’s actual age.
“If fossil calcite forms swiftly after deposition in the cave, an age of around 288,000 to 290,000 years is plausible for the fossil,” Stringer noted.
“However, if the fossil was in the cave before the calcite developed, that age is a minimum estimate.”
The Petrarona skull, partially coated with calcite, is now estimated to be nearly 300,000 years old – Credit: Chris Stringer
Despite this caution, the timeline for Petrarona now closely aligns with another well-known Homo heidelbergensis skull from Kabwe, Zambia, which dates back about 300,000 years.
“Morphologically, they are similar and seem to be converging in their dating,” Stringer remarked.
This discovery underscores the idea that Homo heidelbergensis had a broad geographic presence and an extensive time span, overlapping rather than directly giving rise to other human species.
In simpler terms, contrary to earlier beliefs, they are not the common ancestors of modern humans and Neanderthals; Homo heidelbergensis was likely our contemporary for at least some time.
Stringer emphasized that this enriches our understanding of human evolution.
Researchers from the Wellcome Sanger Institute and the Spanish Institute of Biology have mapped the female genome of the Atlas Blue Butterfly (Polyommatus atlantica), revealing 227 pairs of autosomes and four sex chromosomes, marking it as the organism with the highest chromosome count among all multicellular animals globally.
Atlas Blue Butterfly (Polyommatus atlantica). Image credit: Roger Villa.
The Atlas Blue Butterfly is native to the mountainous regions of Morocco and Northeast Algeria.
Previously suspected to have the highest chromosome count in the Animal Kingdom, this is the first instance where scientists have successfully sequenced the butterfly’s genome to confirm this assumption.
Variations in chromosome numbers are believed to facilitate the formation of new species and assist in adaptation to changing environments.
The Atlas Blue Butterfly belongs to a group of closely related species that have evolved rapidly over a short geological timeframe.
“The genome is crucial for understanding how organisms develop and what the future may hold,” stated Professor Mark Blaxter from the Wellcome Sanger Institute.
“To narrate the stories of our planet, we must explore various tales and observe their interactions.”
“Insights gained from one genome can also enrich our understanding of others.”
“For instance, chromosomal rearrangements are also present in human cancer cells, and investigating these patterns in the Atlas Blue Butterfly could lead to methods for mitigating cancer cell growth in the future.”
In their research, Professor Blaxter and his team discovered that chromosomal structure was altered due to less tightly packed DNA.
This indicates that while the amount of genetic information remained similar, it was organized into smaller segments.
Except for the sex chromosomes, all chromosomes were found to be fragmented, leading researchers to estimate a dynamic range of 24 to 229 chromosomes emerging over approximately 3 million years, a brief period in evolutionary terms.
Generally, such drastic chromosomal modifications are considered detrimental; however, the Atlas Blue Butterfly has thrived for millions of years.
Its population faces threats primarily from climate change and human environmental impact.
This study opens numerous avenues for future exploration.
Chromosomal division is thought to enhance genetic diversity by allowing for increased genomic mixing or possibly offering other unforeseen advantages.
While this may enable butterflies to adapt quickly, possessing numerous chromosomes can also introduce complications, potentially making them more susceptible to extinction in the long run.
Further studies comparing other butterfly species will clarify whether genes are lost or retained, offering greater insights into butterfly biology and evolution.
“Observing chromosomal degradation at this level is uncommon, yet evident in butterflies of other species, hinting at a significant need for exploration in this area,” noted Dr. Roger Villa, a researcher at the Evolutionary Biology Institute in Spain.
“Moreover, chromosomes hold the secrets of species, and examining how these changes influence butterfly behavior could help us form a comprehensive understanding of species emergence.”
“When we embarked on studying butterfly evolution, we realized that sequencing the extraordinary Atlas Blue Butterfly was essential,” remarked Dr. Charlotte Wright from the Wellcome Sanger Institute.
“This research emphasizes the collaborative spirit of scientific inquiry.”
“By examining how the chromosomes of the Atlas Blue Butterfly have split over time in specific environments, we can begin to uncover the potential benefits of this phenomenon, how it influences adaptability, and whether there are lessons in the DNA that could aid our future conservation efforts.”
The findings have been published in this week’s edition of Current Biology.
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Charlotte J. Wright et al. Chromosomal evolutionary constraints revealed by the 229 chromosome pairs of the Atlas Blue Butterfly. Current Biology, published online on September 10th, 2025. doi: 10.1016/j.cub.2025.08.032
Rocky, Earth-sized planets in our Milky Way may be surrounded by atmospheres, with new research indicating a strong possibility of liquid water on their surfaces, supporting the potential for life.
Two separate papers, to be released on Monday in the Astrophysical Journal Letters, focus on the TRAPPIST-1 system, which contains seven rocky planets orbiting a single star. Both studies present initial findings from NASA’s James Webb Space Telescope, suggesting that one planet, TRAPPIST-1e, could possess a nitrogen-rich atmosphere, although further research is necessary to confirm this.
These findings represent significant progress in the search for extraterrestrial life both within our solar system and beyond.
Recently, NASA revealed that rock samples from Mars may harbor evidence of ancient microorganisms. Presently, Mars has a thin atmosphere made primarily of carbon dioxide, nitrogen, and argon, but billions of years ago, it likely possessed a much thicker atmosphere that allowed liquid water to exist on its surface.
For quite some time, scientists have maintained that water is a crucial element for life.
For a planet or moon to retain water in liquid form, it must have an atmosphere that prevents instant evaporation into space. This makes the search for exoplanet atmospheres one of the most exciting and promising areas of astronomical research.
“Ultimately, our goal is to identify planets that can support life,” stated Ryan McDonald, an exoplanet astronomer at St Andrews University, Scotland, and co-author of both studies. “To do this, we first need to identify whether these planets have atmospheres.”
The TRAPPIST-1 system is located 40 light-years from Earth and has been extensively studied since its discovery in 2016, as some of its planets may have conditions suitable for extraterrestrial life.
Specifically, TRAPPIST-1e is thought to reside in the so-called “habitable zone,” where liquid water could be present on the surface—not too close to the star to be scorching hot and not too far to freeze.
In a recent study, astronomers utilized NASA’s James Webb Space Telescope to observe four “transits” of TRAPPIST-1e, which occur when the planet passes in front of its star. While the telescope did not directly detect the planet’s atmosphere, it measured how light passing through the atmosphere was absorbed, if one is present.
Like a prism, light can be split into different color bands across the spectrum, and variations in how particular colors are filtered or absorbed can help identify the presence of specific atoms or gas molecules.
For instance, if a specific color is absorbed, it may indicate a high concentration of carbon dioxide, while other color changes could suggest the presence of hydrogen, oxygen, methane, or nitrogen.
“If no color variation is present, the planet is likely just a barren rock,” McDonald noted. “Barren rocks won’t show any color changes in response to light.”
During the four transits, researchers found no signs of a hydrogen-rich atmosphere surrounding TRAPPIST-1e, nor did they observe any indications of a carbon dioxide-rich atmosphere. However, observations from the Webb telescope suggest a potential nitrogen-rich atmosphere.
“This is an exciting development that will significantly narrow down the prospects for a more Earth-like atmosphere,” remarked Caroline Piaulett Graeb, a postdoctoral researcher at the University of Chicago who was not involved in the new research.
Earth’s atmosphere is composed of a significant amount of nitrogen gas. Titan, one of Saturn’s moons, has an atmosphere primarily made of nitrogen and is believed by NASA to harbor a vast underground sea. Although it may be habitable, the methane-rich environment of the moon differs greatly from conditions on Earth.
Piaulet-Ghorayeb, the lead author of a study published last month in the Astrophysical Journal, focused on another planet in the TRAPPIST-1 system, TRAPPIST-1d. This planet is also located within the habitable zone, but the study found no evidence of common Earth-like molecules such as water, carbon dioxide, or methane.
Studying these distant worlds poses significant challenges.
The TRAPPIST-1 star is small and exceptionally active, producing considerable background noise that complicates researchers’ efforts. McDonald and his team dedicated over a year to analyzing data from the Webb telescope in order to isolate and identify chemical signatures from TRAPPIST-1e and its star.
To confirm the presence of an atmosphere, McDonald and his colleagues plan to observe TRAPPIST-1e during an additional 15 transits over the coming years.
They are also looking into three other planets, TRAPPIST-1f, TRAPPIST-1g, and TRAPPIST-1h, which are located further out in the system.
This research aims to bring scientists closer to answering some of the most persistent questions regarding exoplanets and the existence of life.
“We have not yet reliably confirmed the atmosphere of rocky planets outside our solar system, but it opens the door to studying temperate planets,” said Piaulett-Ghorayeb. “However, there is still much to explore.”
Researchers at the Southwest Research Institute have completed a study outlining how the proposed spacecraft could fly by interstellar comets, offering valuable insights into properties of these bodies throughout the solar system. Leveraging recent findings from interstellar comet 3i/Atlas, they explored mission concepts and concluded that the proposed spacecraft could potentially intercept and observe 3i/Atlas.
Hubble captured this image of 3i/Atlas when it was 446 million km (277 million miles) from Earth on July 21, 2025. Image credits: NASA/ESA/David Jewitt, UCLA/Joseph Depasquale, Stsci.
In 2017, interstellar object 1i/’oumuamua became the first interstellar comet identified within the solar system.
Following that, the second interstellar comet, 2i/Borisov, was discovered in 2019, and recently, 3i/Atlas was identified this year.
“These novel types of objects present the first true opportunity for humanity to closely examine bodies formed in other star systems,” said Dr. Alan Stern, a planetary scientist at the Southwest Research Institute.
“Flybys of interstellar comets could yield unparalleled insight into their composition, structure, and characteristics, significantly enhancing our understanding of the solid body formation process in diverse star systems.”
Scientists estimate that numerous interstellar objects from distant origins cross Earth’s orbit each year, with up to 10,000 potentially entering Neptune’s orbit in certain seasons.
Dr. Stern and colleagues tackled unique design challenges while defining the costs and payload requirements for interstellar comet missions.
The hyperbolic trajectories and high velocities of these bodies present challenges for current avoidance methods, but this study indicated that Flybee reconnaissance is both feasible and cost-effective.
“The trajectory of 3i/Atlas falls within the intermittent range of missions we designed, and the scientific observations taken during such flybys would be groundbreaking,” stated Dr. Matthew Freeman from the Southwest Institute.
“The proposed mission would involve a rapid, frontal flyby, allowing us to gather substantial valuable data while also serving as a blueprint for future missions to other interstellar comets.”
The research establishes a significant scientific objective for its mission targeting interstellar comets.
Understanding the physical characteristics of a body sheds light on its formation and evolution.
Investigating the composition of interstellar comets may aid in explaining their origins and how evolutionary forces have shaped them since their inception.
Another objective is to thoroughly examine the coma of an object, the escaping atmosphere emanating from its center.
To devise mission orbital options, researchers created software to generate representative synthetic populations of interstellar comets, calculating the minimum energy trajectories from Earth to each comet’s pathway.
Software analyses have indicated that low-energy rendezvous trajectories are achievable, often requiring fewer resources during launch and flight compared to other solar system missions.
Scientists utilized the software to determine the trajectory the proposed spacecraft may have taken from Earth to intercept 3i/Atlas.
They found that the mission could potentially have reached 3i/Atlas.
“It’s incredibly promising regarding the emergence of 3i/Atlas,” noted Dr. Mark Tapley, an orbital mechanics expert at the Southwest Research Institute.
“We have demonstrated that there’s no need to launch any existing technology or mission frameworks that NASA has already employed to engage these interstellar comets.”
The decommissioning of Palmer has played a significant role in contributing to sea level rise, particularly as certain regions of Antarctica face limited access, raising concerns among scientists regarding potential ice sheet collapses.
In a statement to NBC News, the National Science Foundation (NSF) announced plans to streamline resources by consolidating McMurdo, Amunsense Cott South Paul, and Palmer Station, with the goal of maintaining three research stations operating throughout the year in Antarctica.
A spokesperson for the U.S. Antarctic Program (USAP) mentioned that they aim to “maintain an active and influential presence in Antarctica while facilitating cutting-edge research in biology and glaciology.”
The NSF was the first to propose the termination of the lease this spring, following the Trump administration’s proposed budget cuts of 55%. Scientists expressed their disappointment that Congress initiated the process of abolishing the ship before finalizing its budget.
“Oceanologist Karos Moffat, an associate professor at the University of Delaware, discussed the budgets that have made advancements in both Senate and House appropriations committees.
The NSF is exploring alternative vessels to take on some of Palmer’s responsibilities and plans to return the vessel to its owner, Edison Chowest, a marine transport company based in Louisiana.
In 2024, the NSF finalized the charter of another Antarctic vessel, RV Laurence M. Gould, which has been upgraded to operate in sea ice, rather than utilizing icebreakers. This reduces the options available for enhancing research in polar oceanography and supporting Palmer Station, an annual base on the Antarctic Peninsula that previously depended on two ships.
The NSF mentioned on Friday that there are “alternatives” available to support and resupply Palmer Station, including commercial options.
Measuring 308 feet, the Palmer, named after a 19th-century seal captain, commenced its service in 1992, exploring various regions of Antarctica. The vessel accommodates approximately 22 crew members and can host around 45 scientists.
No other U.S. research vessels can fulfill all the missions that this polar icebreaker is designed for. The vessel is crucial for studying Antarctic ecology, the Southern Ocean carbon cycle, and monitoring the rate at which ice shelves recede and melt, ultimately influencing sea level rise.
Julia S. Werner of the University of Houston, second from the right, friend of Nathaniel B. Palmer.Courtesy Julia S. Werner
While satellites offer valuable data on the dynamics of ice sheet growth and reduction, the primary research on these changes relies on subsurface measurements.
Without such data, U.S. scientists will lack critical insights into the major ice sheets of the Southern Ocean, which are key to predicting future flooding risks in U.S. coastal cities. For instance, researchers highlight that other U.S. vessels are not suitable for safely accessing the notorious Swaitonga glacier, often referred to as the “end of the Apocalyptic Glacier.”
Researchers frequently describe the West Ku as a cork for a bottle that could rapidly drain the West Antarctic ice sheet, serving as a protective barrier against its collapse into the Amundsen Sea. This could result in a sea level rise exceeding 10 feet over a span of hundreds of thousands of years.
By the year 2100, the likelihood of such a collapse could elevate sea levels significantly beyond the 1-3 feet previously anticipated, as indicated in recent reports by the Intergovernmental Panel.
This disintegration could also alter ocean circulation patterns, affecting how quickly the ocean absorbs carbon, which remains an active area of research. Several studies suggest that current Earth temperatures may have surpassed the threshold for collapse, although further investigation is necessary.
Current shifts in mass and stability are influenced by factors occurring hundreds or thousands of feet beneath the water’s surface, necessitating optimal access through robotic instruments.
“To grasp the drastic changes occurring, it’s essential to be at the edge of the ice where it interacts with the ocean,” Werner explained. “And that’s precisely what this boat allows us to do.”
Scientists typically travel to Palmer every two years, using the data collected over the course of a month or more to advance their laboratory research.
The information gathered aboard the vessel is invaluable, enabling scientists to study ice comprehensively for over a decade, adding vital icebreakers to the U.S. science fleet and alleviating the longstanding backlog of researchers seeking fieldwork opportunities at Palmer.
As we grow older, our cognitive learning and memory capabilities decline—recent studies have identified the proteins responsible for this phenomenon.
Researchers at UC San Francisco have pinpointed the culprit: an iron-associated protein called FTL1. Its detrimental effects hinder cognitive awareness throughout the aging process, and understanding this may allow us to target it in treating neurodegenerative diseases such as Parkinson’s and Alzheimer’s.
“It’s essentially a reversal of the challenges,” said Saul Vilda, PhD, Associate Director and Senior Author of the Papers at UCSF Bakar Aging Research Institute; Natural aging. “It’s about more than just slowing or preventing symptoms.”
The hippocampus, a brain region essential for learning and memory, is particularly susceptible to the effects of aging. Researchers observed an increase in neuronal FTL1 in the hippocampus of older mice, correlating with cognitive decline and reduced intercellular connections.
The hippocampus, shown here, is vital for the formation of new memories (credit: Getty Images)
In an experiment, scientists artificially increased FTL1 levels in young mice, leading to brain and behavior changes reminiscent of older mice. Elevated FTL1 levels hinder synaptic connections, ultimately resulting in poorer memory performance.
Interestingly, their motor skills and anxiety levels remained stable, indicating that the cognitive impairments were specifically linked to memory and synaptic functions.
When researchers reduced FTL1 levels in the hippocampus of older mice, they noted improved neuronal connections and enhanced performance in memory tests, effectively reversing some signs of aging.
The FTL1 protein is involved in iron storage and metabolism, regulating long-term levels in the brain. As we age, alterations in iron metabolism lead to increased FTL1 in neurons.
By reversing aspects of cognitive aging in mice, this discovery could pave the way for treatments that counteract the effects of FTL1 in the brain, potentially restoring cognitive function in older adults.
“Identifying elements that seem to promote aging while keeping your brain youthful is crucial for overall health and activity as you age. FTL1 appears to be an anti-aging champion,” stated Andrew Steel in BBC Science Focus.
“This is an intriguing preliminary study, but as this research was conducted on mice, we must observe whether the same effects occur in humans.”
“We were astonished by its unusual characteristics and how it differs from other dinosaurs, or even all known living or extinct animals,” stated Richard Butler, co-leader of the project and paleontologist at the University of Birmingham in the UK.
The chance to examine the fossils of Spicomelas was to “sway the spine,” Butler remarked.
It wasn’t only the project participants who were captivated.
“This is genuinely one of the most bizarre and unique dinosaurs I have ever encountered,” said Steve Brusatte, a vertebrate paleontologist at the University of Edinburgh, who was not part of the research.
“With spikes jutting out across its body, it resembles a kind of reptilian porcupine,” he mentioned on Thursday. “If you were a carnivorous dinosaur from the Jurassic period, you would definitely want to steer clear of this creature.”
Brusatte continued: “This exemplifies how much there is still to uncover. Prior to the discovery of these fossils, there was no indication that such a remarkable animal existed.”
Maidment, another co-leader of the study, emphasized the need for further research in Africa, noting that countries such as Morocco are untapped reservoirs for dinosaur exploration.
“It’s vastly underrepresented compared to other continents,” said a representative from the National Museum of History in London.
Maidment mentioned that the Spicomellus project, which commenced in 2018, encountered numerous challenges, including the Covid-19 pandemic.
The UK team was set to travel and collaborate with their Moroccan counterparts when British Prime Minister Boris Johnson declared the lockdown, resulting in a postponement of plans until 2022.
In spite of these obstacles, research initiatives have marked significant progress in Moroccan science.
“This research has significantly advanced Moroccan science. I have never encountered a dinosaur like this before. There’s still so much more to discover in this area.”
During the Mesozoic era, from 252 to 66 million years ago, analyses of the oxygen isotope composition in dinosaur teeth revealed that the atmosphere contained significantly more carbon dioxide than it does today, with global plant photosynthesis levels roughly double those of the present.
Fossil teeth of Camarasaurus from the Morrison Formation in the US. Image credit: sauriermuseum aathal.
A study conducted by Göttingen University and researcher Dr. Dingsu Feng examined the dental enamel of dinosaurs that roamed North America, Africa, and Europe during the Late Jurassic and Late Cretaceous periods.
“Enamel is one of the most stable biological materials,” they explained.
“It captures different oxygen isotopes based on the air dinosaurs inhaled with each breath.”
“The isotope ratios of oxygen reflect fluctuations in atmospheric carbon dioxide and plant photosynthesis.”
“This connection allows us to infer insights about the climate and vegetation of the dinosaur era.”
“During the late Jurassic, about 150 million years ago, the air contained four times more carbon dioxide than before industrialization, prior to significant human emissions of greenhouse gases.”
“In the late Cretaceous, around 730 to 66 million years ago, carbon dioxide levels were three times higher than today.”
Teeth from two dinosaur species, the Tyrannosaurus Rex and Kaatedocus siberi, showed an exceptionally unique oxygen isotope composition.
This phenomenon is indicative of carbon dioxide spikes linked to major geological events like volcanic eruptions—such as the massive eruption of the Deccan Traps in India at the close of the Cretaceous period.
The heightened photosynthetic activity of plants at that time on both land and water is likely associated with elevated carbon dioxide levels and higher average annual temperatures.
This research marks a milestone in paleoclimatology. Historically, soil and marine proxy carbonates have served as the primary tools for reconstructing past climates.
Marine proxies, which are indicators of sediment fossils and chemical signatures, help scientists comprehend ancient marine environmental conditions, yet these methods often involve uncertainties.
“Our approach offers a fresh perspective on the planet’s history,” Dr. Fenn remarked.
“It paves the way to use fossilized tooth enamel for probing the composition of Earth’s atmosphere and plant productivity during that era.”
“Understanding these factors is crucial for grasping long-term climate dynamics.”
“Dinosaurs may well become new climate scientists, as their teeth have recorded climate data for over 150 million years. At last, we have received their message.”
Study published on August 4, 2025, in Proceedings of the National Academy of Sciences.
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Dingsu Feng et al. 2025. Mesozoic Atmospheric CO2 Concentrations reconstructed from the enamel of dinosaur teeth. PNAS 122 (33): E2504324122; doi: 10.1073/pnas.2504324122
First identified in 1997 and officially classified as a distinct species in 1999, the Indonesian coelacanth (Latimeria menadoensis) is one of only two extant species of coelacanths. This deep-sea fish closely resembles its ancient Cretaceous ancestors.
A deep diver approximately 1 meter behind the Indonesian coelacanth (Latimeria menadoensis) was found at a depth of 144 m in Northern Mark, Indonesia. Image credit: Alexis Chappuis.
Coelacanths belong to the group of fish known as Sarcopterygians and are characterized by their distinctive coastal dwelling.
Long believed extinct for 65 million years, coelacanths were serendipitously rediscovered in 1938 off the coast of South Africa by museum curators and local fishermen.
These fascinating fish possess unique features, including paired fins and lobed fins that resemble highly modified swim bladders.
Together with lungfish, they are among the closest living relatives to tetrapods, exhibiting several morphological traits not present in more distantly related vertebrates, like ray-finned fish.
The coelacanth first appeared in the early Devonian period, gradually diversifying during the Devonian and Carboniferous periods, with peak diversity observed in the early Triassic.
During the Cretaceous, they were classified into two families: the Latimeridae, which has survived as two species in the genus Latimeria, and the now-extinct Mawsoniidae.
Upon the discovery of the first living specimen, its resemblance to many fossilized forms from the Cretaceous period led to it being labeled a “living fossil,” indicating minimal evolutionary change over millions of years.
The two extant species are the coelacanth of the West Indian Ocean (Latimeria chalumnae) found near the Comoros Islands, and the coelacanth in the waters around Sulawesi, Indonesia.
The latter species is far better documented than its African counterpart, making its deep-reef habitat challenging to access for scientific observation, which has primarily relied on submersibles or remotely operated vehicles (ROVs).
Left profile of the Indonesian coelacanth (Latimeria menadoensis), showcasing a unique pattern of white dots. Image credit: Alexis Chappuis.
The Indonesian coelacanth is a rarely documented medium-deep sea fish (non-tetrapod sarcopterygian), originally endemic to the Sulawesi region, primarily identified through bycatch in eastern Indonesia.
“Very few observations of this species have been made in situ, primarily using submersibles and ROVs.”
“The first direct in situ observations were reported following recent reconnaissance dives that explored the suspected habitat of the Indonesian coelacanth at depths exceeding 150 meters.”
Researchers encountered the Indonesian coelacanth in October 2024 during a deep dive in the Marc Archipelago, situated between Sulawesi and Western New Guinea.
“It is premature to assess the population of this newly identified Malukan coelacanth,” they stated.
“Since the Marc Archipelago connects Sulawesi and Western New Guinea, it suggests that the species is not confined to a single location.”
“Our recent findings, along with studies conducted in the mesophotic coral ecosystems of the Marc Archipelago since 2022, not only confirm the existence of Latimeria but also indicate a broader, more suitable habitat for coelacanths.”
“We hope this discovery will motivate local and national authorities to enhance conservation efforts in this biodiversity-rich region.
The research team’s paper was published online on April 23, 2025, in the journal Scientific Reports.
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A. Chapuis et al. 2025. The first record of a living coelacanth from Northern Mark, Indonesia. Sci Rep 15, 14074; doi:10.1038/s41598-025-90287-7
Researchers have raised concerns about a novel type of acid rain that is becoming increasingly prevalent, complicating efforts to mitigate its impact; I did it poses a hazard to all forms of life on Earth.
Trifluoroacetic acid (TFA) — a type of persistent “forever chemical” — is now found in rain and snow globally, in concentrations significantly higher than in past decades.
While the exact implications of TFA for human health and the environment remain unclear, some scientists are suggesting that these chemicals I did it may present an existential risk.
“Recent findings indicate that TFA can interfere with critical Earth system processes, such as mammalian embryo development and diminished soil respiration,” stated Professor Hans Peter Alp, a chemist at the Norwegian University of Science and Technology, in BBC Science Focus.
Professor Alp’s latest research categorized TFA as a planetary threat comparable to global warming and ozone depletion.
“We are uncertain about the long-term consequences,” he continued. “Due to the global accumulation of TFA, any long-term effects may manifest on a worldwide scale.”
“Moreover, when TFA impacts the environment, it does not break down naturally, making intervention too late. Existing technologies for TFA removal are prohibitively expensive and only applicable in limited scenarios.”
The ARP paper emphasized the necessity of taking proactive measures to curb the rapid buildup of TFA before it is officially deemed an emergency threat.
“In the heating and cooling sectors, this means we must avoid gases that lead to TFA formation,” Alp added.
“Another necessary step is to phase out pesticides and pharmaceuticals that produce TFA during degradation.”
Some nations have already begun taking action. Denmark is leading the charge, having banned 23 pesticide products in July 2025 due to their association with TFA contamination.
TFA is merely one of countless forever chemicals. Other PFAs are linked to health issues such as reproductive problems, fetal deformities, and various cancers – Credit: Chris Macrolin via Getty
TFA belongs to a category of “Forever Chemicals,” more formally known as polyfluoroalkyl substances (PFAs), which are notably resistant to degradation.
Among these persistent chemicals, TFA is one of the smallest. It can infiltrate the environment from sources such as refrigerants, aerosols, pesticides, air conditioning units, landfills, and sewage systems. When larger PFAs degrade, they often convert into TFA.
Because of its small size, TFA readily dissolves in water. This property contributes to its prevalence as a persistent chemical, as it is rapidly increasing not only in rain but also in rivers, lakes, groundwater, oceans, vegetation, food, and urine.
The ARP indicated that finding TFA in “previously untouched water resources” could be alarming. This is particularly troubling as TFA is considered nearly impossible to remove from drinking water.
Some scientists suggest that TFA may not pose significant risks to humans because it does not linger or accumulate in our bodies but is quickly excreted through urine.
However, the ARP maintains that new evidence shows an increasing presence of TFA in humans, animals, and ecosystems.
“We observe that TFA can penetrate cells, becoming integral components of lipids, proteins, and cellular structures. This may explain noticed alterations in microbial activity within soil,” stated ARP.
Researchers, including Alp, are exploring methods to eliminate TFA from the environment, such as cultivating crops that can absorb TFA.
Nonetheless, Alp emphasizes that further research is essential to assess the true level of threat posed by TFA. In the meantime, he urges that “the foremost priority is to curtail emissions before irreversible global consequences unfold.”
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About our experts
Professor Hans Peter Alp is a chemist at the Norwegian Geotechnical Institute and a professor at the Norwegian University of Science and Technology. His research focuses on how pollutants behave in environments that include microplastics, everlasting chemicals, metals, and more.
Invasive mites are increasingly spreading to various regions of the country, as rising temperatures can aggravate serious symptoms and facilitate the transmission of lesser-known infections that may occasionally lead to death.
In May, researchers from the Connecticut Agricultural Experiment Station in New Haven made a significant finding: ticks with elongated holes have become carriers of bacteria responsible for Ehrlichia infection. The rise in cases has raised substantial alarm.
“I hesitate to say it’s a brewing storm,” remarked Goudarz Molaei, director of the lab’s mite testing program. “Climate change will ultimately eliminate winters in our region, allowing these mites, among others, to remain active year-round.”
Milder temperatures, which have already resulted in shorter winters, heighten the risk of long-hole mites and other varieties awakening early from hibernation and biting.
The longhorn ticks, originally from East Asia, have now been identified in at least 21 states, including Michigan, where the first sighting was reported at the end of June. Researchers are uncertain how the tick entered the U.S., but it likely arrived via imported livestock or other animals.
Goudarz Molaei, an entomologist at the Connecticut Agricultural Experimental Bureau, discovered Ehrlichia Chaffeensis in longhorned mites. This pathogen can lead to a potentially fatal tick-borne disease known as ehrlichiosis. Nidhi Sharma / NBC News
In 2017, the first longhorned mites were identified in New Jersey, although the species may have been present in the U.S. as early as 2010.
“These are prevalent research findings,” noted Dana Price, an associate research professor of entomology at Rutgers University.
Modeling indicates that regions from southern Canada down through the U.S. are suitable environments for longhorned mites.
In summary, there are dual threats. As the geographic range of longhorned ticks expands, the duration of their activity and the potential for disease transmission also increase, scientists warn.
Ehrlichiosis is already so common that the affected region is informally labeled the “ehrlichiosis belt,” which stretches north to Connecticut and New York, including parts of Arkansas.
Both the lone star and black-legged ticks have long carried Ehrlichia Chaffeensis. The infection sends about 60% of patients to the hospital and results in mortality in 1 in 100 cases, according to the Centers for Disease Control and Prevention. Individuals who contract the infection typically experience fever, chills, muscle pain, headaches, and fatigue within 1-2 weeks post-bite. If left untreated, the infection can lead to serious complications, including brain and nervous system damage, respiratory failure, uncontrolled bleeding, and organ failure.
Since 2000, the number of reported cases of ehrlichiosis has steadily increased, with the CDC documenting 200 cases in 2000 compared to 2,093 in 2019. Research suggests that annual ehrlichiosis cases are likely severely underreported; according to a study from Rutgers University, 99% of cases go undetected.
Researchers are capturing long-horned ticks for testing for Ehrlichia Chaffeensis. Nidhi Sharma / NBC News
This month, the CDC reported that emergency room visits related to tick bites in July were more frequent than in the previous eight Julys. Early in July, officials closed Pleasure Beach, a popular swimming location in Bridgeport, Connecticut, due to the discovery of multiple ticks, including longhorn ticks this summer.
Manisha Jutani, a commissioner for the Connecticut Department of Public Health, stated that as climate change makes the “tick season” more predictable, residents should take precautions such as wearing long pants and inspecting themselves and their pets for ticks after spending time outdoors.
“The reality is that with the changes we see in the climate, outdoor exposure poses infection risks, and we may encounter pathogens more frequently,” Jutani remarked.
While longhorn ticks generally prefer livestock blood over human blood, entomologists note that their unique reproductive biology poses a significant public health threat. Like bees, they can reproduce without a mate, enabling a single female to generate a population of thousands.
Moreover, feeding on the same host can allow them to ingest pathogens carried by other ticks. This co-feeding transmission method is commonplace among many tick species.
Molaei expressed concern over the recent identification of bacteria that cause ehrlichiosis in longhorned ticks, raising alarms about other pathogens that ticks might acquire and transmit to humans. Longhorned and lone star ticks, the original carriers of Ehrlichia, typically feed on similar hosts, like white-tailed deer.
Jennifer Pratt contracted ehrlichiosis in 2011 and underwent several months of antibiotic treatment. Courtesy Jennifer Pratt
“We share this world with numerous important mites and must learn to coexist with them,” Molaei stated. “The essential factor is to protect yourself.”
The World Health Organization indicates that over 17% of global infectious diseases are spread by vectors carrying viruses, bacteria, and other pathogens among animals. Tick-borne diseases in the U.S. make up 77% of reported vector-borne diseases, with CDC data showing that cases have more than doubled in the last 13 years.
Jennifer Pratt was bitten by a tick during this surge. She contracted ehrlichiosis from a tick bite in North Carolina in the summer of 2011.
When she struggled to lift her 2-year-old son, a nurse friend urged her to seek immediate medical attention, suspecting a tick-borne infection.
After being diagnosed, Pratt was on antibiotics for several months due to her illness. The infection caused her shoulder to lock—a rare but serious complication of tick-borne diseases—forcing her to undergo physical therapy and take three months off work.
Full recovery from the lingering effects of the infection took over a year.
“The best way I could describe it,” she recalled, “was that I felt like death.”
A few years later, as she started to recover, she was also diagnosed with Lyme disease and Babesiosis, both resulting from the same tick bite.
Pratt co-founded a nonprofit advocacy organization, Tick-Borne Conditions United, to raise awareness about the dangers of tick-borne diseases, especially lesser-known infections like ehrlichiosis.
“My mission in life is to help people recognize and confront the realities of tick-borne diseases,” Pratt said. “It’s vital that we raise awareness about this growing threat.”
Researchers have stabilized ring-shaped carbon molecules by adding “bumpers” to protect the atoms.
Harry Anderson
An innovative variety of whole carbon molecules is currently under investigation at standard room temperature. This marks only the second instance of such research since the synthesis of the spherical buckyball 35 years ago. These advancements may lead to the development of materials that offer substantial efficiencies for emerging electronic and quantum technologies.
Carbon molecules composed of circulating rings can display unique chemical characteristics and, similar to buckyballs and carbon nanotubes, can conduct electricity in unexpected ways. Nonetheless, these rings are fragile and often disintegrate before researchers can analyze them.
“Cyclic carbons are fascinating molecules that we’ve been endeavoring to create for quite some time,” said Harry Anderson from Oxford University. Traditionally, it was essential to maintain a sufficient length for studying the molecules, but Anderson and his team have discovered a method to stabilize cyclic carbon at room temperature.
This process involves modifying the cyclic carbon structure. The researchers have achieved this with unprecedented molecular constructs—specifically, rings consisting of 48 carbon atoms known as cyclo[48]Carbon, or c48. They augmented the c48 by incorporating a “bumper” that prevents the 48 atoms from colliding with one another or with additional molecules.
“There are no unnecessary embellishments,” remarked Max Fonderius from Ulm University, Germany. “Simplicity possesses an exquisite elegance.”
A new configuration called Cyclo[48]carbon [4]Catenan remains stable for approximately two days, allowing researchers to investigate c48 for the first time. Interestingly, the molecule’s 48 carbons behaved as if they were arranged in infinite chains, a formation that enables charge transfer between atoms indefinitely.
This remarkable conduction ability suggests that cyclic carbon could be utilized in a variety of next-generation technologies, including transistors, solar cells, semiconductors, and quantum devices. Nonetheless, further inquiry is necessary to validate this potential.
Innovative techniques for stabilizing cyclic carbon may also inspire other scientists to explore exotic carbon molecules. “I believe there is likely a competitive race happening right now,” said von Delius. “Consider this elongated ring as a stepping stone toward the creation of an infinite chain.”
Von Delius further explained that a solitary chain of carbon molecules could prove to be even superior conductors than the rings like C48. “It’s truly remarkable, and it represents the next significant advancement,” he stated.
If your teeth are facing damage, innovative toothpastes may soon appear on the market in the coming years. Some of their ingredients may surprise you.
Toothpaste derived from your own hair could offer an effective and eco-friendly method to safeguard and restore damaged tooth enamel during the initial stages of decay, according to new research from King’s College London.
The research team has found that keratin, a protein present in hair, skin, and nails, creates protective layers that emulate the structure and function of natural tooth enamel when interacting with saliva. In their experiments, scientists extracted keratin from animal wool, which is similar to human hair.
The Science Behind the Hair Toothpaste: Explainer (Credit: King’s College London)
Enamel loss and decay are ongoing issues for dental professionals. Factors such as acidic food and drinks, aging, and inadequate oral hygiene contribute to the gradual deterioration of the teeth’s protective layer.
This deterioration can result in tooth sensitivity, discomfort, and, ultimately, tooth loss. “Unlike bone and hair, enamel does not regenerate,” states Dr. Sherif Elshalkawi, Senior Author and Consultant of Prosthetics at King’s College London. “Once lost, it is gone forever.”
While fluoride toothpaste can help slow the process, this groundbreaking keratin-based solution has shown potential to stop it completely.
When combined with naturally occurring minerals in saliva, it forms a dense crystal-like layer that shields teeth, sealing off exposed nerve channels. As these nerves are responsible for sensitivity, this novel treatment not only aids in preventing enamel breakdown but also alleviates current symptoms.
This research has been published in Advanced Healthcare Materials, detailing how scientists extracted keratin from animal wool to form a structured scaffold on the teeth that continues to attract calcium and phosphate ions, ultimately creating a protective enamel-like coat.
This substance can be used daily in regular toothpaste or applied professionally as a gel, similar to nail polish, for targeted restorative treatment. El Sharkawi suggests that this affordable, sustainable method could be available to the public in the next two to three years.
“Keratin presents a revolutionary alternative to existing dental care practices,” comments Sara Gamea, a doctoral researcher at King’s College and lead author of the study.
“It not only draws on biological waste such as hair and skin for a continuous supply but also reduces reliance on conventional plastic resins often used in restorative dentistry, which are harmful and less durable.”
“Keratin also offers a more natural appearance than these alternatives, as it can better match the original tooth color.”
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Top Image: Dr. Sherif Elshalkawi presents the animal wool utilized in this groundbreaking treatment (credit: King’s College London)
Microorganisms residing in your gut might be contributing to your insomnia, according to new research conducted in China. Conversely, your sleep patterns can also impact your gut health.
While earlier studies have hinted at a connection between sleep habits and gut health, a recent analysis featured in the journal General Psychiatry suggests that this relationship may indeed be causal. This implies that sleep can influence your gut directly, and vice versa.
Dr. Ph.D., who leads the research at an affiliated brain hospital of Nanjing Medical University in China, told BBC Science Focus that this study could “reshape our understanding of insomnia and spark interest in microbiome-based interventions.”
In the future, treatment for insomnia could involve gut-focused solutions such as probiotics (found in yogurt or sauerkraut), prebiotics (fiber sources), or even fecal transplants.
“Moreover, gut microbiomes may act as biomarkers, tracking the effectiveness of these treatments and enabling personalized care,” Shangyun noted.
Researchers employed a statistical approach known as Mendelian randomization (using genetic data to determine causal relationships) to explore the connection between insomnia and the gut microbiota.
They identified specific genes connected to insomnia and assessed whether individuals with these genes were more likely to harbor certain gut microorganisms.
The researchers also reversed the inquiry, examining whether specific gut microorganisms could affect the likelihood of developing insomnia.
For their analysis, scientists used data from 387,000 individuals with insomnia alongside gut microbiome data from 26,500 individuals, all sourced from European populations. Thus, these findings may not apply universally.
Intestinal microbiomes comprise the community of bacteria and yeasts inhabiting the digestive system – Credit: Tom Leach / Science Photo Library
The analysis suggested that 41 types of gut bacteria may contribute to insomnia, at least in part.
However, Shangyun indicated that certain microorganisms hold more significance than others. Notably, they identified 14 groups associated with a higher likelihood of insomnia, while others were linked to a lower chance.
In contrast, the research found that insomnia is associated with a decrease of 43-79% in a specific group of seven bacterial types.
Furthermore, insomnia correlated with a 65% increased likelihood of 12 bacterial groups being four times more prevalent in the intestines.
A particular class of bacteria, known as Odlibacter, was found to be closely tied to insomnia risk. This type of gut bacteria is often linked to improved gut health.
Overall, this study highlights a vicious cycle: certain gut bacteria may lead to insomnia, while a lack of sleep can alter gut microbiota.
Shangyun emphasized the need for further research before healthcare providers can recommend gut health strategies to enhance sleep quality.
Read more:
About our experts
Dr. Shi Shangyun is a scientist at the Faculty of Psychiatry, affiliated with the brain hospital at Nanjing Medical University in Jiangsu Province, China.
Researchers have successfully created a chromosomal-level genomic assembly of a sweet potato cultivar known as “Tanzania.”
“Tanzania” sweet potato variety. Image credit: Benard Yada from the National Crop Resources Institute in Uganda.
The sweet potato is a crucial global staple crop that supports millions of people, particularly in sub-Saharan Africa. Its inherent resilience to harsh climates significantly contributes to food security.
Despite its importance, this humble root vegetable has hidden its genetic complexities for many years.
Sweet potato DNA is exceptionally intricate. While humans have two sets of chromosomes from each parent, sweet potatoes possess six sets.
This phenomenon, known as Hexaploidy, involves deciphering genetic codes that aim to piece together a set of six distinct, albeit similar, encyclopedias mixed together.
Utilizing advanced DNA sequencing and other state-of-the-art technologies, Professor Zhangjun Fei and his team at the Boyce Thompson Institute have produced the first complete genetic blueprint of “Tanzania,” which is widely appreciated in Africa for its stress tolerance and high dry matter content.
The key challenge was organizing the 90 chromosomes of the plant into six original sets known as haplotypes.
The researchers succeeded in either completely or incrementally separating this intricate genetic puzzle.
“Having this complete gradual genome provides an unprecedented level of clarity,” Professor Fei noted.
“This allows us to explore remarkable details of the sweet potato’s genetic narrative.”
The research team found that the sweet potato genome is a mosaic formed from various wild ancestors, some of which remain unidentified.
Approximately one-third of the genome is derived from ipomoea aequatoriensis, a wild species from Ecuador believed to be a direct progenitor of sweet potato cells.
Another significant portion is similar to the wild species of Central America, Ipomoea batatas 4x, though actual wild donors have yet to be discovered.
Dr. Shan Wu, a researcher at the Boyce Thompson Institute, stated:
“In sweet potatoes, ancestral sequences are intermixed within the same chromosome, resulting in a unique genomic structure.”
This complex genetic heritage suggests that sweet potatoes can be tentatively classified as segmented allopolyploids—hybrids that effectively function as though derived from a single species while originating from different ones.
This genomic merging and recombination grant sweet potatoes exceptional adaptability and disease resistance, essential for subsistence farmers globally.
“The six sets of chromosomes in sweet potatoes also contribute to their resilience,” Professor Fei added.
“With multiple versions of key genes, these plants can retain backup copies that assist them in surviving droughts, resisting pests, and adapting to diverse environments. This phenomenon is referred to as the polyploid buffer.”
“However, to fully comprehend the genetic capabilities of sweet potatoes, we need to decode multiple varieties from various regions, as each can possess unique genetic traits absent in others.”
Survey results were published this month in the journal Nature Plants.
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S. Woo et al. Gradual chromosomal level assembly provides insight into the genomic architecture of hexaploid sweet potatoes. Nature Plants Published online August 8, 2025. doi:10.1038/s41477-025-02079-6
Spectroscopy enables astronomers to detect traces of matter in stars, galaxies, and other cosmic entities. Black holes consume dust and encounter various phenomena around them; as material spirals into a black hole, it compresses and heats up. Stephen Finkelstein, a co-author and professor of astronomy at the University of Texas at Austin, noted that all of this can be observed through spectroscopy.
“We’re searching for these signatures of extremely fast gas,” Finkelstein explained. “We’re discussing speeds of 1,000, 2,000, and at times even 3,000 kilometers per second. There’s nothing else in the universe that moves this quickly, so we can confirm it must be the gas surrounding a black hole.”
Scientists have pinpointed a potential distant black hole candidate, which stands as the oldest candidate confirmed via spectroscopy, he added.
Researchers also find galaxies containing new black holes to be intriguing discoveries. According to Taylor, these galaxies belong to a class known as “Little Red Dots.”
While not much information is available about Little Red Dots, they were first detected by the James Webb Space Telescope. Some have been found relatively close by, but Finkelstein indicated that they are likely more prevalent in the early universe.
Investigating the Capers-Lrd-Z9 Galaxy may offer insights into the rarity of red dots and what defines their unique coloration, researchers noted. It could also shed light on the growth of these ancient black holes during the universe’s formative stages.
In subsequent studies, researchers aim to locate more black holes in the distant cosmos.
“We’re just going to examine a very limited section of the sky using the James Webb Space Telescope,” Finkelstein stated. “If we discover one thing, there ought to be more.”
After 25 years of investigation, researchers at Northwestern University in the United States have found out why some adults have acclimatized to near-optimal cognitive functioning since the 1980s.
Referred to as “super agers,” these individuals are over 80 years old, yet their memory capabilities rival those of adults in their 50s and 60s.
Since the year 2000, scientists have examined 290 of these super agers, assessing 77 brains to better understand those who resist cognitive decline.
The study revealed shared personality traits among the ultra-elderly compared to the general population. These individuals often report being highly social and possessing strong interpersonal connections.
However, the differences in personality are merely the tip of the iceberg. Dr. Sandra Weintraub – a Professor of Psychiatry, Behavioral Science, and Neurology at Northwestern and co-author of a new paper summarizes the findings regarding these super agers – “What we observed in their brains was astonishing; it felt like earth-shattering news for us.”
In some super agers’ brains, scientists identified amyloid and tau proteins, commonly known as plaque and tangles, which are significant in the context of Alzheimer’s disease. In other super agers, these were absent.
Nonetheless, no brains exhibited the damage typically linked with these plaques or tangles.
“Our observation is that there are two distinct mechanisms enabling someone to become a super ager,” Weintraub stated. “The first is resistance, meaning they do not develop plaque or tangles. The second is resilience; they do form these but do not experience negative brain impacts.”
Super agers displayed not only varying personality traits but also distinct brain structures, particularly in the size and shape of the cortex.
In addition to that, these super agers exhibited youthful brain structures. While older brains generally have thinner cortices compared to younger ones, these individuals did not show such thinning.
In particular, they displayed remarkable thickness in the anterior cingulate cortex, a crucial area involved in processing information related to decision-making, emotions, and motivations.
Moreover, super agers had a greater number of Von Economo neurons, also known as spindle cells, compared to their normally aging peers. These neurons, located in the cortex, play a significant role in social behavior, emotional processing, and self-awareness.
“Our research indicates that exceptional memory in later years is achievable and correlates with a well-defined neurobiological profile,” Weintraub stated. “This paves the way for novel interventions aimed at preserving brain health in older age.”
Researchers expressed hope that their work would encourage cognitive health and unveil new approaches to slow or prevent future neurodegenerative diseases like dementia.
Water is crucial for life, which is why researchers prioritize finding water sources when exploring other planets. Mars is of particular interest to astrobiologists due to evidence of historical water presence. The current surface of Mars is cold and arid, prompting scientists to investigate what happened to that past water. Studies have indicated that Mars has an active water cycle that produces clouds of water ice, but the existence of water on its surface remains unclear.
Recently, an international team of researchers employed high-resolution imaging and spectral photoanalysis to look for frost on Mars’ volcanoes. They analyzed around 4,200 images obtained using a technology known as color and stereo surface imaging technology from Cassis. This technology utilizes satellite imagery of Mars from the European Space Agency’s Trace Gas Orbiter. The researchers explained that they identified frost by searching for the blue wavelengths in blackcurrant data, as frozen surfaces reflect more brightly at these blue wavelengths of spectral light.
Through their analyses, the team located 13 frost regions across four volcanoes, including Olympus Mons, Seranius Solas, Ascleus, and Arciamontes. They observed images taken over a 12-hour period and noted that high frost concentrations appeared early in the morning on the edges and craters of Olympus Mons. In one crater alone, frost covered an area of about 4,500 km or 3,000 miles, akin to the size of Philadelphia. The researchers estimated that these frost deposits were quite thin, measuring around 10 microns thick, which is roughly one-tenth the width of a human hair.
Next, the team sought to determine if the frost was composed of water or carbon dioxide. Given that Mars’ atmosphere is predominantly carbon dioxide, it is possible for carbon dioxide to freeze. Similar to Earth, Mars has ice in its polar regions; the Martian polar ice caps consist primarily of carbon dioxide, with minor amounts of water. Thus, they theorized that the volcanic frosts could also contain frozen carbon dioxide.
The research team utilized Mars weather research and prediction models to calculate the surface temperature of a volcano over a 24-hour period. They determined that the minimum temperature was -190°F or approximately -120°C, which is too warm for carbon dioxide frost to form, as it typically requires surface temperatures below -200°F or -130°C. However, they proposed that these volcanic frost deposits are likely made of water, as they were found at -140°F or -95°C in the Martian atmosphere.
The researchers highlighted that these Martian volcanoes are among the tallest highland volcanoes in the solar system and located within the equatorial region of Mars. It’s generally not expected that water ice would form in equatorial volcanoes since the slopes and sides tend to be too warm for frost condensation. However, their climate model indicated that the unique topography of these volcanic craters created local weather patterns conducive to frost formation.
Finally, the team carried out further observations and climate model simulations of Olympus and Arciamontes to ascertain whether this frost can form solely during the day or throughout the night. They found that frost accumulated in both volcanoes during the early mornings of winter and spring but not in summer, indicating a seasonal pattern that might reflect variations in Martian temperatures.
The researchers concluded that Mars’ volcanoes produce about 150,000 tonnes, or 150,000,000 kilograms, of water frost daily. They suggested that this frost formation is likely influenced by seasonal atmospheric phenomena such as wind patterns and pressure changes. Studying these processes could help scientists determine the potential for life on Mars; nevertheless, they noted that additional research is needed to rule out direct volcanic water sources.
Galaxies are groups of stars held together by gravitational forces. Most galaxies originated in the first 200 million years after the Big Bang and have transformed over approximately 14 billion years. Early galaxies formed as aggregates of stars that clustered around the center of mass. In the youth of the universe, galaxies were in close proximity, exerting gravitational pull on one another. As the universe expands, the distances between galaxies have grown, reducing their interactions. They have remained far apart, allowing for internal development over billions of years.
Astronomers categorize galaxies based on their current shapes. Those resembling the Milky Way are termed spiral, while circular or oval-shaped ones are called elliptical. Galaxies that fall between spiral and elliptical forms are referred to as lenticular, and any that do not fit into these categories are labeled irregular. Over 75% of galaxies identified by astronomers are spiral in nature. If a spiral galaxy features prominent bars of stars and dust through its center, researchers classify it further as a barred spiral galaxy.
About 60% of spiral galaxies, including the Milky Way, exhibit galactic bars, designating them as barred spiral galaxies. These bars also serve as nurseries for star formation and are catalysts for the galaxy’s evolution. However, astronomers understand that galaxies do not inherently begin with these bars, prompting further investigation into the formation processes and timelines of these features.
This diagram illustrates the galactic classification system developed by 20th-century astronomer Edwin Hubble. The galaxy marked with the “E” label represents elliptical galaxies, while S0 indicates lenticular galaxies. The other “S” labels refer to spiral galaxies, with those labeled “SB” denoting a spiral structure. “Hubble tuning fork diagram” by cosmogoblin is licensed under CC0 1.0.
An international team of scientists researched the formation of bars in 20 galaxies near the Milky Way using advanced analytical techniques developed over the last four years. They gathered data from the TIMER space investigation, focused on the light emission patterns known as spectra from stars near the centers of these galaxies. The TIMER survey utilized the Very Large Telescope in Chile, equipped with a multi-unit spectroscopic explorer called MUSE.
The team initially struggled to obtain spectra for individual stars within these galaxies. As a reference, the closest galaxy studied was 7 megaparsecs away, approximately 23 million light years, or 130 million miles. Individual stars are too diminutive to distinguish at such distances, even with the most precise instruments.
To overcome this challenge, the team analyzed the spectra of stars within two concentric rings representing different regions at the centers of these galaxies. The inner ring comprised stars strictly within the bars of the galaxy, corresponding to an area known as the nuclear disk, while the outer ring included both inner and outer stars of the bar, referred to as the main disk.
They subtracted the spectrum of the stars in the inner ring from that of the outer ring, yielding two distinct light patterns: one for stars within the bar and another for stars outside of it. By treating the combined patterns of each ring as representative of typical stars in those regions, they could estimate the age of individual stars and ascertain when they formed. Past astrophysical models suggest that galaxy bars enhance the star formation rate around their centers. Hence, the team inferred the formation timing of galaxy bars as stars began to form more rapidly within those structures.
With this innovative approach, they estimated the age range for the 20 galaxies studied, with an error margin of approximately 1.5 billion years. Among their sample, the galaxy that formed bars most recently was 800 million years old. Out of the 20 galaxies, 14 formed bars approximately 7.5 billion years ago or later, while the remaining six galaxies established bars around 9.5 billion years ago, with the oldest estimates dating back 13.5 billion years. In contrast to earlier predictions, they found that larger galaxies do not necessarily possess older bars.
From the diverse ages of the bars observed, the team concluded that the formation of galaxy bars is an ongoing process in the cosmos. Their methodology provides astrophysicists with a means of gaining deeper insights into the dynamics of the early universe and the interactions between ancient galaxies, which connect to their present forms. By doing so, future research teams can establish a refined timeline for the universe and identify changes in how dominant forces have shaped galaxies, from their interactions to their internal structuring.
Recent research indicates that older adults who play musical instruments tend to have healthier brains.
One investigation examined the impacts of decades of music practice, while another focused on learning new instruments later in life.
In both studies, engaging in music was linked to better brain health and a decrease in age-related cognitive decline.
The first study was published in PLOS Biology and involved collaboration between Canadian and Chinese researchers. They recruited 50 adults with an average age of 65, half of whom had been playing instruments for at least 32 years, while the others had no musical experience.
Additionally, they included 24 young adults with an average age of 23 who had no musical training.
The researchers utilized magnetic resonance imaging (MRI) to assess blood flow in the brains of the participants.
During the scans, participants listened to a recording of speakers amid background noise, where 50 other voices were present, and were tasked with identifying what the main speaker was saying.
The scans revealed that older musicians’ brains responded to challenges similarly to those of the younger participants.
Nonetheless, older adults showed signs of cognitive decline. Specifically, musicians exhibited strong neural connections on the right side of the brain that non-musicians lacked, which could place additional strain on their brain.
“The brains of older musicians remain finely tuned due to years of training, so they don’t need to play well-tuned instruments at high volumes,” stated co-author Dr. Yi from the Chinese Academy of Sciences.
“Our findings suggest that musical experience helps mitigate the additional cognitive strain typically associated with age-related challenges, particularly in noisy environments.”
A 2025 YouGov poll revealed that 25% of UK adults can play at least one instrument, with the guitar being the second most favored instrument after the piano.
As individuals age, cognitive functions such as memory, learning, and perception often deteriorate, eventually contributing to dementia.
However, researchers posit that cognitive reserve—the brain’s capability to manage damage and decline—can enhance resilience against this deterioration.
The precise mechanisms remain unclear, as noted by Morten Scheibye-Knudsen, Associate Professor of Aging at the University of Copenhagen, Denmark, in an interview with BBC Science Focus.
Some studies suggest that “exercising” the brain through activities like playing instruments, learning new languages, and solving puzzles can improve brain health, but results from other research have been inconsistent.
“Overall, we advocate for brain training, but the evidence is not conclusive,” Scheibye-Knudsen remarked.
Conversely, another recent study, published in Imaging Neuroscience, indicated that musical practice can enhance brain health, even when individuals start playing in later life.
According to a 2024 poll from the University of Michigan, 17% of US adults aged 50-80 engage in playing instruments at least several times a year – Credit: DMP via Getty
Researchers at Kyoto University in Japan continued previous studies that included 53 elderly individuals (average age 73) who took music lessons for four months. Initial findings indicated no significant differences in brain health among participants.
Four years later, the same participants underwent MRI scans (13 of whom had maintained their music practice).
Those who ceased playing their newly learned instruments showed declines in memory performance, with a noticeable reduction in the volume of the putamen—a brain region associated with motor function, learning, and memory.
However, those who continued playing music over the four years exhibited no cognitive decline.
Scheibye-Knudsen noted that the study demonstrates that “playing an instrument not only helps preserve cognitive function as we age, but it may also directly contribute to maintaining the structural integrity of the brain.”
He added, “Engaging in music beyond what this study covered offers additional advantages, such as enhanced social interaction.”
“I encourage people to start making music; it’s never too late to learn.”
Read more:
About Our Experts
Morten Scheibye-Knudsen is an associate professor of aging at the University of Copenhagen, Denmark, and leads the Scheibye-Knudsen Research Group. He also serves as the president of the Nordic Aging Association.
Carbon dioxide monitoring at the Mauna Loa Observatory in Hawaii may be discontinued due to US budget cuts
noaa
Scientists from various countries are urged to prepare for the potential takeover of the major carbon dioxide monitoring services currently operated by the US, according to climate experts.
The monitoring efforts could be terminated next year if budget cuts proceed, leading to the loss of vital data. “At this moment, no one is stepping forward to say, ‘We can take that responsibility,'” states Pierre Friedlingstein from the University of Exeter, UK. “It’s imperative that we do.”
Friedlingstein leads the Global Carbon Budget, an international initiative focused on accurately assessing carbon emissions and absorption by land and oceans, which is essential for understanding global temperature trends.
This work heavily relies on the National Oceanic and Atmospheric Administration (NOAA), whose budget cuts are proposed by the Trump administration. A 2026 budget document suggests eliminating funding for climate and weather research and decreasing the workforce by over 2,000 employees. Furthermore, it plans to close labs, including the Mauna Loa Observatory, a key CO₂ monitoring site.
“NOAA GML [Global Monitoring Laboratory] is essential for the Greenhouse Gas Program, which supports multiple functions,” says Ralph Keeling from the California Institute of Oceanography.
NOAA directly measures gas levels, including CO2, at various sites and aids in monitoring at additional locations worldwide. According to Friedlingstein, this includes calibrating measurements with samples sent from different areas.
The agency compiles and evaluates global data, leveraging subtle variations in CO2 levels across locations, combined with knowledge of atmospheric circulation, to trace CO2 flows accurately.
“NOAA provides critical baseline data,” Keeling noted. “If NOAA’s efforts cease, our ability to monitor CO2 and other greenhouse gas emissions globally will diminish.”
“All of these responsibilities must be assumed by other organizations,” Friedlingstein observes.
However, exchanging the loss of monitoring sites and NOAA records for new data poses challenges. “This is where maintaining long-term consistency becomes crucial,” Keeling explains. “It can’t simply switch from one data set to another; this would compromise the reliability of trend analysis.”
There is particular concern regarding ongoing monitoring at Mauna Loa, which has been conducted since 1957, providing the longest continuous CO₂ record from a single location. NOAA supports the Scripps-led monitoring efforts.
“Without NOAA’s involvement, continuing nearby measurements becomes challenging, although not impossible,” Keeling states.
He also expresses worry about Scripps-led monitoring in Antarctica, which currently depends on NOAA personnel from the US Bureau. The site’s funding, sourced from the National Science Foundation, is also at risk.
“Antarctica represents the most significant long-term station in the Southern Hemisphere. Establishing a reliable long-term global average is just as critical as the Mauna Loa data, particularly for tracking variations between the Northern and Southern Hemispheres through large-scale carbon flows,” says Keeling.
CO₂ levels can also be monitored using certain satellites, which, according to Friedlingstein, measure CO₂ not just at the surface but throughout the entire atmospheric column up to the satellite.
When asked whether there’s a plan to substitute NOAA’s functions, the European Union’s Copernicus Atmosphere Monitoring Service New Scientist reached out to the European Commission’s Defense Industry and Space Administration (DEFIS). DEFIS did not reply before the deadline for this article.
Today’s rotation is inexplicably accelerating, making it one of the shortest days of the year.
While summer days are certainly longer, July 9th, 2025, will be 1.3 ms shorter than the average.
This speed fluctuates slightly, but it generally takes 24 hours, or 86,400 seconds, for one complete rotation around the axis. To monitor these variations, International Earth Rotation and Reference System Services (IER) continuously tracks the length of the day with remarkable precision.
In 2020, the IER noted that our planet has been spinning faster and has continued this trend since then.
Their data suggests that the shortest days of the year will occur on July 9th, July 22nd, and August 5th, when the moon is at its farthest from the equator.
The moon subtly influences Earth’s rotation through tidal braking, where its gravitational pull slightly distorts our planet.
This phenomenon not only creates tides but also gradually siphons off angular momentum from Earth’s rotation, slowing it down by about 2 ms each century.
This means that during the Triassic period, around 200 million years ago, a day was just under 23 hours long. After another 200 million years, we can expect days to extend to 25 hours.
Days were shorter for Brachiosaurus
IERS may implement a second leap second to ensure that high-precision clocks remain accurate. The most recent leap second was added on December 31, 2016.
During times when the moon is far from the equator, the impact on Earth’s rotation is less pronounced, causing these days to be slightly longer. However, the duration seen in recent years is about half of what it was before 2020.
Several events can alter Earth’s rotation, such as the 2011 9.0 magnitude Japan earthquake, which shortened the day by 1.8 microseconds, but the cause of the current accelerating trend remains unknown.
A gradual slowdown is unlikely to have any catastrophic consequences for our planet. The time difference is too minimal for most to notice—you may need to consider skipping a leap second in 2025, with one potentially added again in 2029.
Regardless of the cause, this phenomenon is unlikely to be permanent, and our planet will eventually revert to its long-term rotation pattern.
Recent studies indicate that Earth and the rest of the Milky Way could be drifting through the universe’s voids for billions of years.
By analyzing the echoes left by the Big Bang’s “Soundwave,” a group of astronomers has uncovered that the universe’s voids may be more extensive than previously believed.
If validated, this theory could solve one of the major dilemmas in cosmology known as Hubble tension, which highlights the discrepancy in how quickly our universe is expanding based on various measurement methods.
Astronomers have grappled with this issue for quite some time, finding that the expansion rate measured from the distant universe is significantly slower than that determined from observations of local regions.
“The possible resolution to this discrepancy is that our galaxy resides near the center of a large, local void,” stated Dr. Indranil Banik from the University of Portsmouth at the National Astronomical Conference in Durham.
This situation arises because the area surrounding the void is densely packed with galaxies, and their gravitational influence gradually pulls in nearby galaxies, leading to the void’s slow emptying over time.
“Due to the void’s emptiness, the speed of objects receding from us is greater than if the void were absent,” Banik explained. Thus, it may appear that the local universe is expanding at a faster rate than it truly is.
For Hubble’s tension to hold, the empty void must exhibit a galactic density approximately 20% lower than the universe’s average and span about 1 billion light-years.
Life in the Void
The concept of living within a void is not new, but confirming its existence poses challenges.
For instance, it’s quite difficult to perceive the shape of your environment when you are immersed within it—like trying to analyze your home from inside a room.
Current cosmological theories suggest uniformity across large scales, implying the absence of significant voids within our vicinity.
Galaxies tend to cluster together like the Perseus clusters, separated by large voids. Yet, everything should appear uniform on a grand scale – credits: Image processing Cuillandre (Cea Paris-Saclay), G. by ESA/Euclid/Euclid Consortium/NASA, J.-C. Anselmi
However, Banik’s team has gathered evidence supporting the existence of a local void by studying the acoustic vibrations known as baryon acoustic oscillations (BAO). These fluctuations result from pressure waves produced during the primordial phase of the Big Bang.
Over billions of years, these oscillations have influenced the arrangement of galaxies in the broader universe. If our galaxy is positioned at the center of a void, it would distort the BAO patterns we observe nearby.
This research, drawing on data collected over the past 20 years, reinforces the idea that we genuinely inhabit a vast void.
Real challenges will emerge when examining how life within the void impacts other aspects of the surrounding universe, which may prove to be lonelier than we ever anticipated.
Recent studies have uncovered new insights regarding the timing and locations of cat domestication. Contrary to the belief that these early felines were simply pampered companions or helpful pest eliminators, it appears they may have primarily been bred for mass sacrificial purposes.
Historically, it was thought that the domestication of cats began over 9,000 years ago as Wildcats started to adapt to the first agricultural settlements.
As grain storage attracted rodents, North African Wildcats (Ferris Livica) began hunting these pests, fostering mutually beneficial relationships that ultimately led to domestication.
However, this model is now being rigorously examined. “North African wildcats, the wild ancestors of domestic cats, were believed to have been tamed during the Neolithic era,” states Dr. Shawn Doherty, an archaeological scientist at the University of Exeter and lead author of a study featured in BBC Science Focus.
“Our research challenges this narrative by reviewing existing osteological, genetic, and iconographic evidence. We propose that cat domestication actually began in Egypt around the first millennium BC.”
Dr. Doherty’s team reassessed ancient cat artifacts from archaeological sites across Europe and North Africa, from antiquity to the present, utilizing zooarchaeological analysis, genetics, and radiocarbon dating. They found that the bones from agricultural villages in Cyprus dating back 900 to 500 years ago closely resembled those of Wildcats, undermining prior assumptions of early domestication.
Some misconceptions stem from the small size of cat bones, which can migrate between soil layers over time. “We employed radiocarbon dating to verify the ages, revealing that many cat remains are significantly more recent than previously believed.”
This data implies that the domestication of cats actually occurred much later than previously thought.
Millions of cats were sacrificed and mummified in ancient Egypt, dating from the late period to the Ptolemaic period (715-30 BC). – Getty
Researchers suggest that while rodent control may have played a role in domestication, religion could have been even more significant. In ancient Egypt, cats were revered as sacred to the goddess Bastet, and millions were kept for sacrificial purposes.
“The bond between domestic cats and the Egyptian goddess Bastet peaked in the first millennium BC,” Dr. Doherty noted. “Millions of mummified cats have been discovered in temples dedicated to her. During the Victorian era, these remains were often exhumed and transported to England for use as fertilizer.”
Through the breeding of vast numbers of kittens for ritualistic sacrifice, traits that made them more manageable may have gradually been selected, leading to the emergence of the domestic cat.
A second genome-related study, co-authored by Dr. Doherty, analyzed 87 ancient and modern cat genomes, finding no evidence that domestic cats migrated to Europe with Neolithic farmers. Instead, they likely arrived within the last 2,000 years from North Africa.
“I think this illustrates that the bond between humans and cats is not necessarily a result of the length of time they have been together, unlike with dogs,” Dr. Doherty stated.
Considering the motivations behind their early domestication, it is no surprise that cats exhibit such ethereal behavior.
Both studies are preliminary and are currently awaiting formal peer review.
Read more:
About our experts
Shawn Doherty is a senior researcher at the University of Exeter. His expertise lies in exploring deep time and animal-environment interactions through the integration of fauna, biomolecules (isotope analysis, proteomics, and genetics), alongside historical and anthropological studies.
In the paper published online in the Journal of Comparative Psychology, marine biologists detail 34 interactions where killer whales (Orcinus orca) offered food to humans over the last 20 years. These incidents were reported in oceans worldwide, including locations from California to New Zealand, Norway, and Patagonia. The killer whales provided a diverse array of 18 species: six fish, five mammals, three invertebrates, two birds, one reptile, and one type of seaweed. The authors propose that these occurrences may illustrate a form of general altruism.
Case presented by Towers et al. Wild killer whale (Orcinus orca) utilized prey and other items to incite interactions with humans. Image credits: Towers et al., doi: 10.1037/com0000422.
Altruistic behaviors, such as sharing prey, are prosocial acts that can foster various forms of reciprocity.
Such relationship dynamics lay the groundwork for cerebral development related to the evolution of social norms in species like primates and dolphins.
Despite some cultures among these species benefiting from interactions with other mammals, documented cases of wild animals actively providing for humans are exceedingly rare.
“Orcas frequently share food with one another. It’s a prosocial behavior that helps them build relationships,” remarked Dr. Jared Towers, a researcher at Bay Setrogy.
“We are also intrigued by what they choose to share with people and how that relates to us.”
Dr. Towers and his collaborators, Dr. Ingrid Visser from the Orca Research Trust and Dr. Vanessa Prigollini from the Marine Education Association, collected and analyzed data on the 34 food distribution events they and others encountered.
In 11 cases, people were in the water when killer whales approached them. In 21 instances, they were on boats, and in two cases, they were on the shore.
Some instances were recorded through videos and photos, while others were documented via interviews with researchers.
All incidents had to meet strict criteria for inclusion in the analysis; each case required the whale to approach humans and present items voluntarily.
In every instance except one, killer whales observed the reactions after they offered food, and in seven instances, they initially refused to present it before trying multiple times.
“While domesticated animals like dogs and cats occasionally share food with humans, our study provides one of the first comprehensive accounts of such behaviors in non-domesticated species,” the scientists stated.
“This behavior makes sense, as killer whales are intelligent, social creatures that use food sharing to form relationships with both kin and non-kin.”
“They often hunt prey much larger than themselves.”
“By offering items to humans, they are presented with chances to practice, explore, and engage with the cultural behaviors typical of killer whales, while also learning to manipulate and enhance their interactions with us.”
“We believe that the cognitive abilities and social nature of these animals can help explain these behaviors.”
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JR Towers et al. 2025. Water Test: An Attempt by a Wild Killer Whale (Orcinus orca) to Provide for People (Homo sapiens). Journal of Comparative Psychology in press; doi: 10.1037/com0000422
Mars may appear spherical, yet it is actually a triaxial ellipsoid. Unlike the other rocky planets in our solar system, which resemble rugby balls, Mars varies in size along all three axes.
This is most apparent in the notable bulge of the Tharsis rise region and the contrasting region known as Sirtis Major.
Astronomer Dr. Michael Efroysky of the US Navy Observatory recently proposed that this peculiar shape may be attributed to the absence of an ancient moon on Mars.
The moon, named Nerio after the Roman goddess of war, who was associated with Mars, influenced the shape of the planet through tidal forces, similar to the oceans here on Earth.
However, once Mars cooled down, its deformed shape became permanently fixed.
Mars is roughly half the size of Earth, with a diameter of 6,790km (4,219 miles) compared to Earth’s 12,750km (7,922 miles) – Credit: Mark Garlic via Getty/Science Photo Library
Nerio’s tidal stress weakened the elevated regions of Mars, facilitating the impact of geological processes such as internal convection, structural shifts, and volcanic activity, all of which contributed to Mars’ asymmetrical shape.
Researchers propose that, in synchronous orbit around Mars, Nerio—being less than a third of Earth’s mass—could easily have formed the planet’s initial triaxial shape. The equatorial bulge would have been even more pronounced if Nerio had existed during the planet’s magma ocean phase.
Currently, Mars lacks such a moon, having only the small moons Deimos and Phobos. At some point, Nerio was either destroyed by another large body or pulled away by gravitational forces.
This article answers the question posed by Otto Sykes in an email: “Why does Mars have such a strange shape?”
Please email us to submit your questionsat Question@sciencefocus.com or message us onFacebook,Twitter, orInstagramPage (don’t forget to include your name and location).
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A restless mind is a prevalent obstacle to achieving sleep
Andrii Lysenko/Getty Images
It might be due to age and warmer temperatures, but sleep is becoming increasingly elusive in my household. Between my husband’s insomnia, my child’s energy, and my own racing thoughts, our nights are filled with as much activity as our days. My social media feed has begun presenting videos featuring a technique known as “cognitive shuffle” for inducing sleep, prompting me to explore whether it actually works or if there are other mental tricks that could prove beneficial.
One major hindrance to restful sleep is a restless mind, the very challenge that cognitive shuffle aims to alleviate. Luc Beaudoin from Simon Fraser University in British Columbia, Canada, has devised methods to help you divert your attention from spiraling thoughts and worries before drifting off.
How to Practice Cognitive Shuffling
The concept is straightforward. Pick a random word, such as “plonk,” and think of all the words you can generate from each letter. Examples include Primsol, Puma, Awards…lion, lemon, levitation, and more. As each word surfaces, spend some time visualizing it. This process creates a transitional phase between wakefulness and slumber, mirroring the spontaneous imagery seen in a “hypnotic state.”
Individuals who are good sleepers often report experiencing vivid images just before sleep, while poor sleepers tend to find themselves planning and problem-solving, as noted by Sophie Bostock, a doctor and sleep consultant. “It’s not that we need to empty our minds (which can actually be counterproductive), but rather we should steer our thoughts away from overly logical thinking,” she explains.
Cognitive shuffling seems to foster more fluid thinking. In a small study involving 154 students, those who reported struggling with “pre-sleep wakefulness” benefited from this technique, which shortened their time to sleep.
However, there lacks a gold-standard study on cognitive shuffling. Beaudoin himself conceded that there is no direct comparison between various cognitive techniques utilized at bedtime within the scientific literature.
Consequently, I turned to some of the world’s leading sleep scientists to inquire about their recommendations for anyone hoping to calm their minds at night.
Strategies for Insomnia Relief
Kevin Morgan from the Clinical Sleep Research Unit at Loughborough University in the UK directed me towards Cognitive Behavioral Therapy for Insomnia (CBTI). “CBTI is internationally recognized as the first evidence-based treatment for insomnia disorders,” he asserts.
This therapy focuses on training individuals to manage intrusive thoughts, which can otherwise lead to cognitive arousal (mental alertness), elevate hormones like adrenaline, and disrupt the normal sleep process. CBTI also tackles other facets of insomnia by assisting individuals in overcoming anxieties about sleeplessness and teaches meditation techniques.
While effective, acquiring CBTI techniques typically takes about 6–8 weeks, leading to a high dropout rate.
Morgan mentions that the component of CBTI that appears to yield the greatest benefits is sleep restriction therapy. This counterintuitive method “has proven to be extremely effective” by reinforcing the idea of spending limited time in bed without sleeping.
This echoes the advice I received from Colin S.P., a professor of sleep medicine at Oxford University. He emphasized that “you cannot force sleep. It doesn’t exist in a tangible sense,” he notes. “You can only encourage sleep. It’s an involuntary process that occurs naturally, not something you can will into being. So rather than trying to sleep when you feel ‘slept and tired,’ focus on creating a conducive environment.”
Designing a Sleep Sanctuary
Another straightforward suggestion from several experts is to cultivate a sleep sanctuary in your bedroom. “Sleep-friendly environments are crucial,” advises Joseph Zielzevsky, Senior Vice President of Research and Science Affairs at the National Sleep Foundation. Others concur. “The top recommendation is to create a bedroom that promotes sleep—dark, cool, quiet, and uncluttered,” states Emerson Wickwire, Head of Sleep Medicine at the University of Maryland School of Medicine in Baltimore.
Many experts also highlighted the importance of avoiding screens before bedtime. The blue light emitted can inhibit melatonin production, disrupt circadian rhythms, complicate the process of falling asleep, and prompt unnecessary thoughts. However, Dzierzewski points out that many people engage with emotionally stimulating content, such as news and social media, right before bed. “Regrettably, over half of Americans admit to using screens within an hour of bedtime,” she mentions.
Perhaps the most significant advice I received wasn’t a trick or hint to quiet our racing thoughts at night but rather a prompt to genuinely prioritize sleep. Numerous specialists, including Aparajitha Verma, a sleep medicine neurologist in Houston, Texas, emphasized the necessity of treating sleep as a priority. Morgan reiterates that anyone dealing with insomnia should “seek expert help and engage in recommended treatment strategies as soon as possible.”
Chronic sleep deprivation is linked to increased risks of dementia, type 2 diabetes, obesity, heart disease, and even cancer. This reality alone is enough to keep anyone awake at night. Additionally, thoughts of “organizing” my child’s room linger in my mind. Yet, I am resolved to place it at the top of my to-do list as an immediate concern—hopefully, that will serve as a positive first step towards achieving a restful night for all.
Researchers have found that endangered species of killer whales in the Pacific Northwest utilize tools crafted from kelp for mutual care.
A new study published in Current Biology reveals that scientists observed the Southern resident whales producing tools by tearing bull kelp and rolling it between each other during social interactions.
Drone footage captured the kelp being pushed against a companion, revealing a whale engaged in an extended grooming session.
“What’s particularly remarkable is that although this behavior appears to be common, despite the regular drone observations over these whales for nearly 50 years, it has never been documented.” stated Lead author Dr. Michael Weiss from the Whale Research Center in Friday Harbor, Washington.
The endangered Southern resident population has fewer than 80 individuals residing in the Salish Sea, situated between British Columbia and Washington.
While tool use is well recognized among primates, elephants, and birds, it remains scarce in marine species.
Weiss and her team observed this behavior across various age groups and social units, noting that whales are more inclined to groom relatives or older companions.
Two whales interact by rubbing against each other. These scrubs may serve hygienic functions. – Whale Research Center, NMFS NOAA permit 27038
Whales with greater amounts of dead skin participated more frequently in this behavior, suggesting a connection to hygiene.
The findings underscore the cultural identity of Southern residents and emphasize the necessity of conservation efforts. It remains uncertain whether this tool-assisted grooming is exclusive to this group or if it occurs in other whale populations.
Weiss remarked, “It was incredibly thrilling to discover that whales are not just utilizing tools but employing them in ways previously unreported in marine mammals.”
While we acknowledge that reducing greenhouse gas emissions offers a sustainable and long-term solution to climate change, we continue to see rising emissions. As some exacerbate climate challenges, others are exploring options that were once beyond the scope of mainstream discussion.
This article is part of our special issue, showcasing how experts evaluate some of the more unexpected concepts in science. Click here for additional details
The term “geoengineering” broadly refers to human interventions in climate systems aimed at maintaining ecosystems and cooling the planet. Yet, the definition of geoengineering remains elusive; it can encompass endeavors from reforestation to the deployment of massive underwater curtains to support ice sheets.
Some geoengineering concepts spark more debate than others. Large-scale reforestation, when executed properly, is generally seen as a positive climate action. However, more radical ideas—like altering sunlight’s interaction with the Earth’s atmosphere—invoke heightened concerns.
“The risk-return dynamics vary significantly,” states Janice Lachance of the non-profit American Geophysical Union (AGU), which has recently introduced an “Ethical Framework” for scientists in this field. She elaborates, “Planting trees in a park is relatively straightforward and widely accepted. However, when we delve into novel technologies and methodologies, the situation rapidly shifts.”
Take, for example, the concept of solar radiation management (SRM), which proposes reflecting additional sunlight back into space to cool the planet. This can be approached in three fundamental ways (illustrated in the graphics below). Although early modeling suggests that SRM could yield cooling effects within just a few years of implementation, it may also disrupt rainfall patterns and cloud formation.
SRM has historically been a contentious area of research, but as temperatures climb and climate impacts intensify, it has garnered attention from scientists, policymakers, and philanthropists alike.
While some activists argue against this line of research, fearing it diverts focus from the urgency of rapid emission reductions, Andy Parker of the Degree Initiative—a nonprofit concentrating on SRM—cautions that merely reducing emissions may no longer suffice for humanity to tackle climate change’s consequences.
“We must explore strategies to manage the risks posed by previously released greenhouse gases,” he asserts. Moreover, without international dialogue on geoengineering, “there’s a heightened risk of individual nations—especially those severely affected by climate change—unilaterally pursuing geoengineering projects.”
In this context, an increasing number of scientists are advocating for geoengineering research. “Some researchers feel they are falling short in meeting the objectives outlined in the Paris Agreement,” notes Lachance. Consequently, the AGU has devised an ethical framework to guide climate intervention research.
The concerns regarding research extend beyond methodologies. Concepts of planetary-scale geoengineering often place developing nations—particularly those near the equator—at greater risk of unforeseen consequences, such as disruptions to monsoon patterns. Yet, the majority of geoengineering research is concentrated in wealthier countries, which have less to lose.
As part of the Degree Initiative, Parker collaborates with researchers from lower-income countries in the Southern Hemisphere to develop SRM research capabilities. He hopes this will ensure that future deployment decisions take into account the populations most affected. “We don’t hold a stance on whether SRM should be utilized or not,” he explains. “What we do want is for developing nations to have informed avenues for their own research.”
Explore other articles in this series with the links below:
Every spring, billions of Bogong moths (Agrotis infusa) migrate from their breeding grounds in southeastern Australia, covering distances of up to 1,000 km to reach previously unvisited locations.
The Bogong Moth utilizes stellar cues and Earth’s magnetic fields to develop a precise navigation system for long-distance night travel. Image credits: Lucinda Gibson & Ken Walker, Museum Victoria / CC by 3.0.
“While we already knew that certain birds and humans can navigate by stars, this is the first evidence showing that insects can do the same,” noted Professor Eric Warrant from the Australian National University and the University of South Australia.
“Bogong moths are remarkably precise navigators. They use stellar patterns as compasses, adjusting their course according to seasonal changes and the time of night.”
“Each spring, billions of Bogong moths emerge from their breeding sites in southeastern Australia, traveling up to 1,000 km to specific caves and rocky outcrops in the Australian Alps.”
“The moths remain dormant in cool, dark shelters throughout the summer and then return in autumn to breed and die.”
Researchers utilized advanced flight simulators and recorded brain activity in a controlled, magnetically neutral environment to study the moths’ navigation under various conditions.
Even without the natural starry sky or magnetic fields, the moths consistently flew in the correct seasonal direction.
They reversed their flight path when the night sky was rotated by 180 degrees, but became disoriented when the stars were jumbled.
“This demonstrates they aren’t merely flying toward the brightest light or relying on simple visual indicators,” Professor Warrant remarked.
“They interpret specific patterns in the night sky to establish their geographical bearings, similar to migratory birds.”
Remarkably, when the stars were obscured by clouds, the moths relied solely on Earth’s magnetic field for navigation.
This dual navigational system guarantees reliable orientation in diverse conditions.
Professor Warrant and his team explored the neurological basis of this behavior and discovered specialized neurons in the moths’ brains that respond to star patterns.
These neurons, located in regions responsible for navigation and steering, are most active when the moth faces south.
“This directional tuning indicates that the Bogong moth’s brain encodes celestial information in an exceptionally sophisticated manner,” added Professor Warrant.
“This discovery exemplifies the complex navigational capabilities inherent in the brains of small insects.”
The findings could have implications for robotics, drone navigation, and conservation strategies for species threatened by habitat destruction or climate change.
Bogong moth populations have dramatically declined in recent years, prompting their listing as vulnerable.
This research underscores the necessity of protecting their migratory paths and the dark skies they depend on.
“This insight isn’t merely academic; it illustrates how animals perceive their surroundings,” Professor Warrant stated.
“The night sky has guided human explorers for millennia, and now we understand it also guides moths.”
This study was published this week in the journal Nature.
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D. Drayer et al. Bogong Moths utilize a star compass for long-distance navigation at night. Nature Published online on June 18th, 2025. doi:10.1038/s41586-025-09135-3
While scientists pursuing cancer therapies find ample support, those researching diseases in potatoes face greater challenges in garnering attention and funding.
The Trump administration seems to have adopted the notion that many scientific pursuits are viewed as unnecessary or opaque, resulting in billions in proposed cuts to research funding.
Amidst this crisis, researchers are exploring innovative ways to garner public and political backing to counteract funding reductions.
A collective of Cornell graduate students aims to reshape public perceptions of science. They have enlisted over 500 researchers from all 50 states to write OP-EDs for local newspapers, which are set to be published next week. This initiative was proposed by Emma Scales, a Cornell doctoral student involved in the campaign.
“We’re engaging with people who are frustrated by the lack of transparency regarding funding allocations,” Scales explained. “I understand that I’m one of those who utilizes your resources. I apologize for not communicating better, but I’d appreciate feedback about my work.”
Isaco di Tomasi, Hannah Frank, Emma Scales, and Alex Rand lead the Cornell Policy Club, coordinating McClintock’s letters. Courtesy Emma Scale
The initiative, known as McClintock Characters, is one of several ongoing efforts by graduate students and faculty aimed at the same goal.
This reflects a mainstay belief that researchers cannot assume public support is a given. If proactive measures aren’t taken soon, many are beginning to realize that the public’s trust in scientists is waning, and funding may not be reinstated.
Science Homecoming letter-writing campaigns urge scholars to emphasize the importance of government investments in scientific endeavors. The new nonprofit, Stand Up for Science, is organizing demonstrations at State Fairs and Farmers Markets this summer, along with community Teach-Ins and Open Lab Days. Another new group, Your Neighborhood Scientist, publishes essays by researchers and fosters community-based dialogues about science.
Audrey Dorottos, a neuroscientist from the University of Pennsylvania and co-founder of Your Neighborhood Scientist, sees her work as a means for scientists to express their enthusiasm.
“We aren’t just contributing static noise; we aim to humanize scientists, which is a fundamental objective,” she said.
Di Tomasi is delving into the fungal disease that contributed to the potato famine in Ireland. Courtesy Isako di Tomassi
The motivation behind the McClintock letters emerged in February when Isako Di Tomassi, a plant pathology doctoral student, expressed his frustrations online after losing his PhD advisor at the US Department of Agriculture due to recent significant government layoffs.
While Di Tomassi encountered some sympathy online, one commenter remarked that funding cuts were beneficial since they halted “frivolous research,” and many others expressed confusion regarding the purpose of their studies.
Di Tomasi and Scales began brainstorming solutions through the Cornell Advanced Science and Policy Club to facilitate researchers sharing their narratives.
They organized these efforts in tribute to the late Nobel Prize-winning cytologist Barbara McClintock, timing their actions for her birthday on June 16. Her research altered scientists’ understanding of genetic inheritance in corn, laying the groundwork for advancements in treating genetic disorders in humans.
Barbara McClintock, a pioneer in genetic research at the Cold Spring Harbor Laboratory in Long Island, NY, circa 1947. AP
“Barbara McClintock is incredibly renowned,” Di Tomasi remarked.
Nevertheless, Di Tomasi noted that the aim is to bridge the gap between scientific professionals and public understanding, emphasizing that even routine experiments can be pivotal for medical and scientific advancements.
Researchers have committed to discussing a variety of topics, from breast cancer metastasis to memory formation and sustainable grape cultivation. Based on the collective audience sizes targeted by the organizers’ chosen news outlets, they anticipate reaching 8 million potential readers.
During a webinar on June 6, Katherine Xue, a microbiologist at the University of California, Irvine, guided about 100 participants on composing OP-EDs, using a 2015 OP-ED by Newt Gingrich advocating for increased research funding as a reference.
Xue encouraged participants to avoid technical jargon and to inject personal elements. She intends to write an article for her hometown newspaper in Oak Ridge, Tennessee, highlighting how her high school internships fueled her interest in microbiology.
“As scientists, we are conditioned to maintain a sense of detachment, but this approach has limitations,” Xue explained to NBC News. “Many people don’t see scientists as relatable, nor do they grasp what we are doing and why. This can lead to distrust in science.”
Recent surveys back up her assertions, revealing that while 76% of Americans express confidence in scientists, this number has dwindled from 87% in 2020, as reported by a Pew Research Center study. The report also noted that a majority of Americans believe scientists are poor communicators, and nearly half feel that scientists view themselves as superior.
The notion of supposedly frivolous research projects has long been a target for criticism. Some senators have highlighted what they perceive as wasteful spending in scientific research.
In a speech to Congress, Trump criticized what he considered absurdly funded projects backed by the Biden administration, including research misrepresented as making mice transgender (though in reality, it examined the effects of hormones on health and fertility). The White House defended the President’s comments.
In response to inquiries regarding the reduction of research funding, White House spokesperson Kush Desai stated that the administration is aligning with voter priorities. “The American people have tasked President Trump with recalibrating government expenditures to align with their values,” he clarified in an email. “The administration is committed to fulfilling this mandate.”
President Donald Trump criticized federally funded research during a congressional address on March 4th. Allison Robbert/AFP via Getty Images
For her upcoming book, Salmon Cannon and Floating Frog, Carly Ann York, an animal behaviorist at Lenore Lynn University in North Carolina, spotlighted several scientists who have faced scrutiny to advocate for their research.
One professor included in the book reacted with humor to the label “waste” applied to her research by participating in collaborative efforts with fellow scholars, like creating a mini science fair on Capitol Hill, to share research insights on shrimp combat inspiring new body armor designs for humans.
Carly Ann York became committed to scientific communication after grappling with explaining her studies on squid physiology to others years ago. Courtesy Carly York
“I hope more scientists adopt this mindset,” York stated. “It’s our responsibility to help the public comprehend how taxpayer money is utilized in research, what we do, and the impact of our work.”
Will the McClintock letters and similar initiatives achieve their intended results? While it’s uncertain how many students and faculty will participate, many participants hope their goals reach beyond immediate outcomes.
According to Michael Rubel, a physics professor at New York City College and a former Director of Public Relations for the American Physical Society, success hinges on sustained engagement with the public.
Rubel remarked that scientists should actively participate by attending community groups like Rotary clubs, churches, or PTA meetings.
“If researchers wait for the public to come to them, they will only engage a fraction of the population, and I doubt this will effect meaningful change,” he stated. “Meet audiences where they are. Understand what they value. You might be surprised.”
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