Predators have evolved saber teeth many times throughout the history of life. And now we have a better understanding of why these teeth develop the way they do.
Saber teeth have very special characteristics. Very long, sharp canine teeth that tend to be slightly flat and curved rather than round. Such teeth have evolved independently at least five times in different groups of mammals, and fossils of saber-toothed tiger predators have been found in North America, South America, Europe, and Asia.
These teeth were first known to appear in mammal-like reptiles called gorgonopsians about 270 million years ago. Another example is Thylacosmiluswhich became extinct about 2.5 million years ago and was most closely related to marsupials. Saber teeth were last seen Smilodonoften referred to as the saber-toothed tiger, existed until about 10,000 years ago.
To find out why these teeth continued to re-evolve, Talia Pollock and colleagues from the University of Bristol, UK, examined the canine teeth of 95 species of carnivorous mammals, including 25 species of saberodonts.
First, the researchers measured, classified, and modeled the shape of the teeth. They then 3D printed a smaller version of each tooth in metal and tested its performance in a puncture test in which the teeth were mechanically pushed into a gelatin block designed to mimic the density of animal tissue.
This showed that the saber teeth could drill into the block with up to 50% less force than the other teeth, Pollock said.
The researchers then evaluated the tooth shape and puncture performance data using a measure called the Pareto rank ratio. This determines how optimal the tooth is in terms of strength or puncture.
“Carnivores’ teeth need to be sharp and thin enough to pierce the flesh of their prey, but they also need to be blunt and strong so they don’t break when the animal bites,” Pollock says.
i like animals Smilodon It had very long saber teeth. “These teeth probably appeared over and over again because they’re the perfect design for puncture,” Pollock says. “They’re very good at drilling holes, but that also means they’re a little more fragile.” For example, California’s La Brea tar pits have Smilodonsome broken tooth.
Other saberodonts also had teeth shaped ideally for slightly different tasks. cat Dino Feliz According to Pollock, they had squatter saber teeth for a more even balance of sting and strength.
The teeth of other saber-toothed species fall between these optimal shapes, which may be why some saber-toothed teeth did not last very long. “These are trade-offs,” Pollock said. “Aspects of the shape of your teeth make you good at some things and bad at others.”
One of the leading theories as to why the saber-toothed tiger species went extinct is that the ecosystem changed and the large prey that the saber-toothed species, such as mammoths, were thought to have gone after disappeared.
The team’s blowout findings support this. Giant teeth would not have been as effective in catching prey as large as rabbits, and the risk of tooth breakage here may have increased, making saber-tooths more effective prey. would have been defeated by someone. Pollock says it’s difficult to hunt prey like cats with small teeth.
“As ecological and environmental conditions changed, highly specialized saber-toothed tiger predators quickly became unable to adapt and went extinct.” Stefan Lautenschlager At the University of Birmingham, UK.
“I think that’s part of the reason why this saber-toothed form hasn’t evolved again now. We don’t have megafauna,” he says. Julie Michen At Des Moines University, Iowa. “The prey isn’t there.”
The bright and dark part of Mercury's north pole seen from the BepiColombo spacecraft
ESA/BepiColombo/MTM
These images illustrate the pockmarked surface of Mercury and are a preview of what to expect as the BepiColombo mission enters orbit around the innermost region of our solar system in late 2026.
Since its launch in 2018, the joint Japan-Europe spacecraft BepiColombo has made six flybys of Mercury, gradually decelerating with each pass to fine-tune its trajectory for orbital insertion. While the mission’s primary scientific instruments are yet to be utilized, the spacecraft’s cameras have already provided detailed images of the planet.
The European Space Agency (ESA) recently released three striking images captured during BepiColombo’s latest flyby on January 8, taken from an altitude of around 300 kilometers above Mercury’s north pole and northern regions.
David Rothery, from the Open University, UK, shared his excitement about the images, saying, “We had to wake up early to see these close-ups, and they exceeded our expectations based on simulated views we studied beforehand.”
The image above showcasing Mercury’s north pole reveals the sharp contrast between light and darkness on the planet, known as the terminator line. This region shows extreme temperature variations, with some areas exposed to scorching sunlight while others remain perpetually shaded within craters.
Notably, shadowed regions containing potential frozen water deposits can be observed along the terminator line in the image. Rothery further highlights the fascinating details visible, such as the sunlit peak inside Tolkien Crater, providing key insights for the mission’s scientific objectives.
Scientific investigations suggest that these shadowed crater areas may harbor frozen water, a key aspect of BepiColombo’s mission to uncover the presence and extent of water on Mercury.
Mercury's vast volcanic plain known as Borealis Planum
ESA/BepiColombo/MTM
Mesmerizing images from BepiColombo’s mission highlight Mercury’s expansive volcanic plain known as Borealis Planitia, formed over 3 billion years ago from massive lava flows that engulfed existing craters, some of which are visible in the image. While most of these plains are relatively smooth, more recent impact craters provide intriguing targets for scientific study.
Spanning 1,500 kilometers, the Caloris Basin is the largest crater on Mercury, appearing as a semicircular light-colored feature on the planet’s surface. Once BepiColombo enters orbit, researchers aim to investigate the relationships between the Caloris Basin, Borealis Planitia, and the solidified lava flows connecting them.
Natal Facula, believed to be the remains of the largest volcanic eruption in Mercury's history, is seen as a bright spot in this image.
ESA/BepiColombo/MTM
The illuminated region at the top of the planet, known as Natal Facula, is believed to be the aftermath of Mercury’s most significant volcanic eruption. The presence of a central crater, approximately 40 kilometers wide, indicates multiple eruptions that scattered volcanic material over hundreds of kilometers.
Rothery expresses eagerness for future observations of Natal Facula by BepiColombo’s instruments, emphasizing its scientific importance in understanding Mercury’s volcanic history. Discovering the reasons behind Mercury’s enduring volcanic activity remains a key goal of the mission.
IIn the West Bank city of Nablus, Rashid Abueide operates a nut roaster to support his family. Additionally, he is an award-winning game developer. A decade ago, amidst the escalating 2014 Gaza war, he created a compelling video game titled “Lilya and the Shadow of War” which depicts a man’s quest for safety for his daughter and himself. However, amidst the falling missiles, it becomes evident that safety is unattainable. Initially rejected by Apple upon release in 2016 due to inappropriate content, the decision was eventually reversed after a week of protests.
Despite the acclaim and attention “Lilya” received, Abueide struggled to secure funding for his next game through conventional means. His envisioned game, “dream on the pillow,” narrates the story of the 1948 Nakba and reflects on the Arab-Israeli conflict through a mother’s folklore. Rejected nearly 300 times for being contentious and risky, Abueide’s games challenge the narratives surrounding the Palestinian experience, which has long been taboo.
Historical Background…The game’s timeline switches between the protagonist Om’s past and her horrifying present. Photo: Rasheed Abueide
Currently, as conflict rages in his homeland, Abueide is resolute in telling the Palestinian narrative. With the collaboration of a dedicated team, he initiated a crowdfunding campaign to bring “Dreams on a Pillow” to life.
Despite challenges, the team successfully reached its fundraising goal through Launch Good, a platform that acknowledges Muslim causes. This achievement covers a significant portion of the game’s development costs, paving the way for further funding opportunities as the project evolves. Abueide expresses gratitude for overwhelming support and emphasizes the importance of portraying the Palestinian plight in gaming.
“I want to send a message.” Rashid Abueide, who operates a nut roaster in Nablus. Photo: Rasheed Abueide
“The Dream on the Pillow” draws inspiration from a mother fleeing with her infant, inadvertently carrying a pillow and recalling her childhood in Palestine. The game interweaves her journey post-Tantura massacre with nostalgic dreams, using the pillow as a key element for progression but also triggering nightmares. Abueide anticipates a two-year development timeline, underscoring the project’s significance with contingency plans in place for potential interruptions.
Abueide’s ultimate goal is for players to empathize with the Palestinian experience, understanding the lasting impact of past conflicts on present realities. By shedding light on the ongoing struggles of the Palestinian people, he aims to prompt an informed and empathetic response from players.
Quantum computers could use heat to eliminate errors
Chalmers University of Technology, Lovisa Håkansson
A small cooling device can automatically reset malfunctioning components in a quantum computer. Its performance suggests that manipulating heat may also enable other autonomous quantum devices.
Quantum computers are not yet fully operational because they have too many errors. In fact, if a qubit, a key component of this type of computer, is accidentally heated and has too much energy, it can end up in an incorrect state before calculations can even begin. One way to “reset” a qubit to the correct state is to cool it.
Simone Gasparinetti For the first time, researchers at Sweden's Chalmers University of Technology have delegated this task to an autonomous quantum “fridge.”
Researchers have constructed two qubits and a single qubit, which can store more complex information than a quantum bit, from a tiny superconducting circuit. The qutrit and one of the qubits form a refrigerator for the second target qubit, which can eventually be used for computation.
The researchers investigated the interaction between the three components so that if the target qubit has too much energy and an error occurs, heat automatically flows out of the qubit and into the other two elements. carefully designed. This lowered the temperature of the target qubit and reset it. Because this process is autonomous, qubits and quantum trit refrigerators were able to correct errors without external control.
aamir aliThe researchers, also at Chalmers University of Technology, said this approach to resetting qubits required less new hardware and produced better results than traditional methods. Without a major redesign of the quantum computer or the introduction of new wires, the starting state of the qubit would be accurate 99.97% of the time. In contrast, other reset methods typically only manage 99.8%, he says.
He said this is a powerful example of how thermodynamic machines, which deal with heat, energy, and temperature, can be useful in the quantum realm. nicole junger halpern I worked on this project at the National Institute of Standards and Technology in Maryland.
Traditional thermodynamic machines like heat engines sparked an entire industrial revolution, but so far quantum thermodynamics hasn't been very practical. “We are interested in making quantum thermodynamics useful, and this potentially useful autonomous quantum refrigerator is our first example,” says Jünger Halpern.
“I'm glad that this machine has been implemented and has become useful. Being autonomous, it does not require external control and should be efficient and versatile,” he says. Nicholas Bruner at the University of Geneva, Switzerland.
Michał Holodeck Researchers at the University of Gdańsk in Poland say one of the most pressing problems for quantum computers built with superconducting circuits is to keep the machines from overheating and causing errors. He says the new experiment paves the way for many similar projects that have been proposed but untested, such as using qubits to build autonomous quantum engines.
The researchers are already considering whether they can take the experiment further. For example, we might create autonomous quantum clocks or design quantum computers with other functions that are automatically driven by temperature differences.
Experts and politicians are warning that significant changes to Meta’s social media platform are setting it on a collision course with lawmakers in the UK and the European Union.
Lawmakers in Brussels and London have criticized Mark Zuckerberg’s decision to remove fact-checkers from Facebook, Instagram, and Threads in the US, with one MP describing it as “absolutely frightening.”
Changes to Meta’s global policy on hateful content now allow users to refer to transgender people as “it,” and the guidelines state that “no mental illness or abnormality based on gender or sexual orientation shall be permitted.”
Chi Onwula, a Labor MP and chair of the House of Commons science and technology committee, has expressed alarm at Zuckerberg’s decision to eliminate professional fact-checkers, calling it “alarming” and “pretty scary.”
Maria Ressa, a Nobel Peace Prize-winning American-Filipino journalist, has warned of “very dangerous times” ahead for journalism, democracy, and social media users due to Meta’s changes.
Damian Collins, the former UK technology secretary, has raised concerns about potential trade negotiations by the Trump administration that could pressure the UK to accept US digital regulatory standards.
Mehta’s move, revealed as a response to Donald Trump’s inauguration, has sparked predictions of challenges from the Trump administration on laws like the Online Safety Act.
Zuckerberg has hinted at extending his policy of removing fact-checkers beyond the US, raising concerns among experts and lawmakers in the UK and EU.
Regulatory scrutiny on Meta’s changes is expected to increase in the UK and EU, with concerns about the spread of misinformation and potential violations of digital services law.
Mehta has assured that content related to suicide, self-harm, and eating disorders will continue to be considered high-severity violations, but concerns remain about the impact on children in the UK.
HWhat do you think, humans? My name is Arwa and I am a genuine member of this species homo sapiens. We are talking about 100% real people; meat space This is it. I am by no means an AI-powered bot. I know, I know. That's exactly what the bot says, isn't it? I think you'll just have to trust me on this matter.
By the way, the reason I have such a hard time pointing this out is because content created by real humans is becoming kind of a novelty these days. The internet is rapidly being overtaken by advances in AI. (It's not clear who coined the term, but “slop” is a sophisticated iteration of Internet spam: low-quality text, video, and images generated by AI.) recent analysis It is estimated that more than half of all English long-form posts on LinkedIn are generated by AI. Meanwhile, many news sites are secretly experimenting with AI-generated content, in some cases signed. Author generated by AI.
Slop is everywhere, but Facebook is actively sloshing strange AI-generated images, including bizarre depictions. Jesus was made of shrimp. Much of the AI-generated content is created by fraudsters looking to drive user engagement, rather than remove them from their platforms. fraudulent purpose – Facebook accepted it. A study conducted last year by researchers at Stanford and Georgetown found that Facebook's recommendation algorithm is accelerating. These AI-generated posts.
Meta also creates its own slops. In 2023, the company began introducing AI-powered profiles like Liv, a “proud black queer mom of two and truth teller.” These didn't get much attention until Meta executive Connor Hayes talked about them.financial timesThe company announced in December that it plans to fill its platform with AI characters. I don't know why he thought bragging that soon we'll have a platform full of AI characters talking to each other would work, but it didn't. Meta quickly deleted the AI profile after it went viral.
For now, people like Liv may be gone from Meta, but our online future looks increasingly sloppy. The gradual “ensitization” of the Internet, as Cory Doctorow memorably called it, is accelerating. Let's pray that Shrimp Jesus will perform a miracle soon. we need that.
Are you familiar with uterine fibroids? It’s not surprising if you’re not, as they are not widely discussed. However, they can affect 70-80% of women by age 50. Despite being more prevalent among Black women, women of color are often underdiagnosed.
Uterine fibroids are growths of muscle and fibrous tissue in the uterus, typically occurring in women aged 30-50. These fibroids can vary in size and shape and can be found in different layers of the uterus, leading to various symptoms.
Although referred to as “benign” tumors by doctors, uterine fibroids can still cause numerous issues, such as heavy menstruation, lower abdominal pain, and pressure on other organs when they grow large enough.
Uterine fibroids are influenced by genetics, family history, and ethnicity, as well as hormones like estrogen and progesterone, which stimulate their growth. While pregnancy can lead to an increase in fibroid size due to higher hormone levels, they are commonly detected through ultrasound scans.
Treatment options for uterine fibroids vary based on symptoms and pregnancy plans. Some women may opt for monitoring small, asymptomatic fibroids, while others may choose drug therapy to reduce hormone levels and shrink the fibroids.
Surgical treatments like myomectomy or hysterectomy can also be considered, but these may not be suitable for women looking to conceive. Uterine fibroids can significantly impact pregnancy, increasing the risk of complications like miscarriage and premature birth.
Despite available treatments, awareness of uterine fibroids remains low. Increasing awareness about menstrual health and pregnancy complications is crucial for timely and effective treatment.
American paleontologists have discovered the fossilized remains of a new species of sauropod dinosaur that lived in the northern hemisphere (Laurasian supercontinent) during the Carnian period of the late Triassic period, about 230 million years ago.
reconstruction of Avaitum banduichethe world's oldest known low-latitude dinosaur species. Image credit: Gabriel Uguet.
Until now, it was thought that dinosaurs originated deep in the high latitudes of the Southern Hemisphere (Gondwana supercontinent).
The dinosaur fauna of Gondwana and the earliest dinosaur occurrences in the Northern Hemisphere (Laurasian supercontinent) were separated by 6 to 10 million years.
However, the newly described Laurasia species lived at the same time as the oldest known southern dinosaurs.
named Avaitum banduicheThis sauropod is the oldest known Laurasian dinosaur.
“Avaitum banduiche Dr. Dave Loveless of the University of Wisconsin Museum of Geology and his colleagues found that “Dinosaurs lived in Laurasia during or shortly after a period of huge climate change known as the Carnian Plug, which previously led to the diversification of dinosaur species. “It was involved in the early stages of.” .
“The climate at the time was much wetter than before, turning vast, hot desert regions into more hospitable habitats for early dinosaurs.”
Avaitum banduiche It was about 1 meter (3 feet) long from head to tail.
“Avaitum banduiche “It's basically the size of a chicken, but it has a very long tail,” Dr. Lovelace said.
“We think of dinosaurs as giant behemoths, but they didn't start out that way.”
fossil remains are Avaitum banduiche It was discovered in 2013 at Garrett's Surprise (named after Garrett Johnson, the undergraduate field assistant who discovered the locality), a small outcrop of the Popo Aggie Formation in Wyoming.
“These fossils reveal the world's oldest equatorial dinosaur, which is also the oldest North American dinosaur,” Dr. Loveless said.
At the same Garrett's Surprise site, paleontologists also discovered fossilized bones of dinosaur-like creatures called silesaurids.
“The presence of early low-latitude sauropods from the Northern Hemisphere, along with silesaurids, 230 million years ago casts doubt on the hypothesis that the dispersal of dinosaurs from high-latitude Gondwana was delayed.” the researchers said.
“These data fill a critical gap in the early record of the evolution of sauropod dinosaurs and demonstrate a wide geographic distribution from mid-to-late Carnian times.”
their result will appear in Zoological journal of the Linnean Society.
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David M. Lovelace others. 2025. Rethinking the origins of dinosaurs: The oldest known equatorial dinosaur population (Mid-Late Carnian Popo Aggie FM, Wyoming, USA). Zoological journal of the Linnean Society 203 (1): zlae153;doi: 10.1093/zoolinnean/zlae153
High-resolution UAV-based aerial survey of the massive Bronze Age fortress Domanissis Gora in Georgia, South Caucasus, reveals the extent of a large external fortification system and settlements that are largely undocumented in the region. The exceptional size of D. gora helps add a new dimension to population assembly models in Eurasia and other regions.
Aerial photo of the Domanisis Gora ruins. It shows where two canyons meet. Excavation work on the inner fortress in 2023 is visible in the foreground. Image credit: Nathaniel Erb-Satullo.
Fortified settlements in the South Caucasus appeared between 1500 and 500 BC and represent an unprecedented development in the region’s prehistory.
Located on the border between Europe, the Eurasian steppe and the Middle East, the Caucasus region has a long history as a crossroads of cultures with a unique regional identity.
In a new study, archaeologists focused on Domanisis Gora, a 60-80 hectare fortified settlement in Georgia that is exceptional in its preservation and size.
Dr. Nathaniel Erb Satullo of the Cranfield Institute of Forensic Sciences at Cranfield University and his colleagues wrote: “The fortifications of Domanisis Gora consisted of a double-walled fortified core and a much larger outer shell with additional fortifications. “There is,” he said.
“Two steep-sided gorges, 60 meters deep in places, supplement the defensive walls.”
“Previous research had noted that the site had an unusually large walled enclosure, but the site had not been systematically mapped.”
The researchers used the DJI Phantom 4 RTK drone, which can provide less than 2 cm relative position accuracy and very high-resolution aerial imagery.
To obtain high-precision maps containing man-made features, each feature in the aerial images was carefully checked to confirm its identity.
To understand how the landscape at the site has evolved, the orthophotos were compared to 50-year-old photos taken by a Cold War-era reconnaissance satellite that was declassified in 2013.
This gave scientists much-needed insight into which features are recent and which are old.
The team was also able to assess which areas of the ancient settlement were damaged by modern agriculture.
All of these data sets were integrated into geographic information system (GIS) software to help identify patterns and changes in the landscape.
“The drone takes approximately 11,000 photos and uses advanced software to combine these photos with a high-resolution digital elevation model and orthophotos, which show every point as if looking directly down. We created a composite photo,” said Dr. Elvusaturo.
The researchers found that the Domanisis Gora ruins were more than 40 times larger than originally thought, and included a large outer settlement protected by a kilometer-long wall.
“Using a drone, we were able to understand the importance of the site and document it in a way that would not be possible on the ground,” said Dr. Herv Saturo.
“Domanisis Gora is not only an important discovery for the South Caucasus region, but also has broader significance for the diversity of large-scale settlement structures and their formation processes.”
“We hypothesize that Domanicis gora may have expanded through interaction with mobile pastoral groups, with large settlements outside it expanding and contracting seasonally.”
“The site has now been extensively mapped and further research will be initiated to gain insight into areas such as population density and density, livestock movements and agricultural practices.”
The team’s paper was published in a magazine ancient.
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Nathaniel L. Erb-Saturo others. Megaforts of the South Caucasus: New data from southern Georgia. ancientpublished online on January 8, 2025. doi: 10.15184/aqy.2024.197
Scientists of University of Bergen: The surprising diversity of behavior within the rosette-shaped colony has been revealed. Salpingoeca Rosetta is a rare species of choanoflagellates – the closest relatives of animals.
Artwork depicting calcium signaling in rosette colonies of choanoflagellates Salpingoeca Rosetta. Image credit: Davis Laundon & Kate Zvorykina, Ella MAR Studio, Inc.
“We discovered that communication takes place between the cells of the colony, which regulates the overall shape of the rosette and the beating of the ciliary body,” said Dr. Jeffrey Colgren, a researcher at the Michael Szasz Center at the University of Bergen. Ta.
“Before I put the cultures under the microscope, I didn’t really have any expectations of what I was going to see in the cultures, but once I saw them, I was really excited.”
Multicellularity is a defining feature of all animals, allowing animals to interact with their environment in unique ways by integrating input from highly specialized cell types such as neurons and muscle cells. make it possible.
In the case of choanoflagellates, flagellated bacterial organisms found in marine and aquatic environments around the world, the boundaries between unicellularity and multicellularity are less clear-cut.
including some species Salpingoeca Rosetta exhibiting a complex life cycle that includes a colonial period.
Colonies are formed by cell division, similar to the development of animal embryos, but they do not have specialized cell types and resemble groups of individual cells rather than cohesive organisms.
“Salpingoeca Rosetta “This is a powerful model to study the emergence of multicellularity in animal evolution,” said Dr. Pawel Burkhardt, also from the Michael Saas Center at the University of Bergen.
“Our study provides interesting insights into early sensorimotor systems, as it reveals that colonial flagellates coordinate their movements through a common signaling pathway.”
Using a newly developed genetic tool that can visualize calcium activity Salpingoeca Rosetta The authors found that the cells synchronize their behavior through voltage-gated calcium channels, the same type of channels used by neurons and muscle cells in animals.
“This evidence of how information flows between cells in a choanoflagellate colony points to cell-to-cell signaling at the apex of multicellularity,” Dr. Colgren said.
“Surprisingly, this discovery suggests that the ability to coordinate movement at the cellular level predates the first animals.”
The research team now plans to further investigate how signals are propagated between cells and whether similar mechanisms exist in other choanoflagellate species.
“The tools developed and the results of this study reveal many new and interesting questions,” said Dr. Colgren.
“We’re really looking forward to seeing what direction ourselves and others take this in the future.”
a paper A description of the discovery was published in a magazine scientific progress.
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Jeffrey Colgren and Pawel Burkhardt. 2025. Electrical signaling and cooperative behavior in animals’ closest relatives. scientific progress 11(2);doi: 10.1126/sciadv.adr7434
Paleontologists have discovered two new three-dimensionally preserved aculiferous mollusks from the Silurian period, showing that the earliest molluscs were more complex and adaptable than previously known. It was revealed that there was.
3D model of punk ferox (above) and emo swirl (Bottom) Reconstructed as a digital virtual fossil. Image credit: Mark Sutton, Imperial College London.
The two new Aculifera species are punk ferox and emo swirllived about 430 million years ago.
The specimen was discovered in a Silurian deposit in the county of Herefordshire, England.
These had distinctive spikes and other features that set them apart from the earlier molluscs mentioned above.
Dr Mark Sutton, a paleontologist at Imperial College London, said: “Molluscans are one of the largest and most diverse groups of animals on Earth.
“However, early acripheran molluscs are less well known than their relatives.”
“Information about this group was limited, and for a very long time we thought they were fairly basic, simple, and primitive.”
“It's extremely rare to find fossils that are so well-preserved and have such detailed soft tissues.”
“We were able to create 'virtual fossils', or 3D digital models. This provided us with a treasure trove of information and revealed that the evolutionary branches of molluscs include: It helps you understand that punk ferox and emo swirl It was much more evolutionarily rich and diverse than we expected. similar to other mollusk groups. ”
Sutton and his colleagues used two different methods to obtain clear images of both the interior and exterior of the fossil.
First, an X-ray scan was used to closely observe the internal structure without damaging the exterior.
The fossil is then carefully crushed into very thin layers and photographed at each stage to create 3D images of its external features.
The researchers found that both fossils had smooth undersides, suggesting they lived on the ocean floor, and both had some unique features and unconventional locomotion strategies.
of emo swirl The fossil is preserved in a folded position, suggesting it moved like an inchworm to grasp the vertebrae and push forward.
Meanwhile, how punk ferox Scientists weren't sure if it was still mobile, but it turned out that it had ridge-like legs, unlike any mollusk that exists today.
“The name is punk ferox and emo swirl In fact, our first nicknames for these ancient mollusks were inspired by some of their unique features and personalities,” Dr. Sutton said.
“punk ferox In particular, its spiky appearance clearly resembles a rebellious punk rocker. emo swirl It complemented it nicely. ”
“meanwhile punk ferox They resemble insect-like molluscs with long spines, but also have wide legs and chiton-like gills. ”
“emo swirlIt resembles an earthworm with a similarly long body and spines, but also features a chiton-like shell and compressed body. ”
“Such a combination of features helps us better understand the evolutionary tree of molluscs. This points to a story involving more complexity and diversity than previously thought.”
MD Sutton others. New Silurian aculiferan fossils reveal the mollusk's complex early history. naturepublished online on January 8, 2025. doi: 10.1038/s41586-024-08312-0
The National Oceanic and Atmospheric Administration said the return of offshore wind power is expected to keep fire danger high across the region through Friday morning. Storm Prediction Center.
Santa Ana winds pick up speed as they blow westward down the Great Basin and are typical for this time of year. But when winds gust over the mountains of Southern California toward the Pacific Coast, conditions are usually not completely dry.
“Normally, everything would be wet by now, which means the chances of a fire leading to an out-of-control conflagration like what we're seeing now are much lower,” Moritz said. .
The Palisades Fire burns in a storm on the west side of Los Angeles on Tuesday, with winds shaking the embers. Ringo Chiu/Reuters
All three fires have a 0% containment rate, and firefighting efforts are facing difficult conditions due to continued strong winds.
These catastrophic fires are expected to become more frequent as climate change amplifies the ingredients that help wildfires ignite and spread. Most of California's largest wildfires have occurred in the past decade. According to Cal Fire.
Fires are usually caused by hot, dry, and windy conditions. Moritz said there isn't enough research yet to know whether climate change is causing significant changes in winds, but said global warming is already having an impact on rainfall and droughts. .
The Palisades Fire burns along Pacific Coast Highway in Malibu on Wednesday. Wally Scully/Los Angeles Times via Getty Images
“Climate change is causing more erratic and extreme precipitation patterns,” he said. “This effect on precipitation is very important because we have wetter periods and drier dry periods, and overall the timing of precipitation has become very erratic.”
That means areas like Southern California could experience severe flooding at one point, like in March, and then go into drought months later. Moritz said vacillating between these extremes puts people and their communities at high risk.
“This is a climate signal in all of this that we have now opened this window where such large-scale, devastating extreme events can occur,” he said. Ta.
Eric Porth, director of the California Water Resources Institute, mentioned that having more water tanks in the Palisades area could have been beneficial. However, he noted that municipal water systems, like the one in place, are primarily used for extinguishing residential fires and not typically designed for larger scale emergencies. He emphasized that the current situation has resulted in a significant burn scar that is overwhelming the existing water resources.
Los Angeles officials have advised residents to reduce their water consumption in light of the ongoing fire situation. Quiñones, from the water department, highlighted the need for water conservation to ensure that fire departments have enough resources to combat fires effectively.
Furthermore, a 48-hour boil water notice was issued for a specific zip code that includes the Palisades area and neighboring communities due to declining water quality caused by the fire and ash particles in the system.
Ajami expressed concerns about potential water contamination due to the drop in water pressure during the fire. She pointed out that the compromised pipeline infrastructure could allow external contaminants to enter the system.
Mark Gold, director of water scarcity solutions at the Natural Resources Defense Council, emphasized the impact of climate change on the frequency and intensity of fires. He underscored the need to reassess infrastructure in order to better cope with such disasters.
President-elect Donald Trump has criticized California Governor Gavin Newsom for the wildfires in Los Angeles, attributing the situation to a policy dispute regarding water allocation in the state.
In response to Trump’s accusations, Governor Newsom’s communications director clarified that there is no such document as a Water Restoration Proclamation and emphasized Newsom’s commitment to prioritizing public safety and supporting firefighters.
Gold, formerly associated with the Newsom administration, identified infrastructure issues and environmental factors as key contributors to the water resource challenges in Southern California.
The breeding season for emperor penguins is fraught with danger.
Stefan Christmann/naturepl.com
A rover silently explores a forbidding icy landscape. Suddenly it buzzed to life and spotted an emperor penguin. A 90-centimeter-long robot with a scanning antenna saunters toward the bird, searching for signals from the RFID chip under the penguin's skin to finally understand this enigmatic species. Record important information that may be useful.
Emperor penguins are quickly becoming the stars of countless nature documentaries. 2005 movie march of penguins. This media exposure may give the impression that we have a solid understanding of their ecology. it's not. Almost all of that footage was collected from just two breeding colonies on opposite sides of Antarctica, which make up perhaps 10 percent of the emperor penguin population. For decades, the hundreds of thousands of emperors who lived elsewhere along the continent's coasts were virtually unstudied.
That situation is now changing. Over the past 15 years, researchers have learned more about these birds using new technology, including satellites that can spot colonies from space and AI-powered robots that scan them on the ground. . “I hope we're starting to enter a golden age of research,” he says. Daniel Zitterbart At Woods Hole Oceanographic Institution, Massachusetts.
The research has already revealed subtle differences in the genetics and behavior of penguins at different points along the Antarctic coast, showing that penguins are surprisingly adaptable to changing conditions. But these discoveries were made amid rapid warming in the region, leading the U.S. Fish and Wildlife Service to declare him “Emperor.” Endangered species in 2022.…
Physicians as a whole are a very smart group, but they can be resistant to change. The most famous example is probably the 19th century surgeon who refused to wash his hands when going from the mortuary to the delivery room, spreading undiscovered microorganisms that led to the infant's death. Hungarian doctor Ignaz Semmelweis collected statistics to argue that soap and water can save lives, but was ridiculed and ostracized.
Today, we live in more enlightened times and medical practices are generally supported by evidence, but do we always have the right evidence to make changes? For example, do we always have the right evidence to make changes? There are also indications that bringing it into clinical practice could save lives. As we report in “AI Helps Radiologists Detect Breast Cancer During Physical Exams,” radiologists who choose to use image classification AI to help detect breast cancer are detected one extra case per 1,000 people. Across the health system, the impact can be significant.
Does that mean we should encourage doctors to ditch the scrubs and let the machines do it? Far from it. AI systems with large language models like ChatGPT can pass multiple-choice medical tests, but do poorly at conversational diagnosis (see “AI Chatbot Fails Conversational Diagnosis of Patients”). ). Physicians with a good bedside manner and a listening ear remain essential for now.
We should be bolder when testing medical AI systems in real-world settings
Instead, there are two conclusions that can be drawn from these studies. The first is that we need to be careful in using the general term “artificial intelligence.” Although the two systems we report share underlying neural network technology, image classification is a completely different task than text generation, and the latter risks the AI spitting out plausible but inaccurate results. much higher. In other words, not all AIs are created equal.
The second conclusion is that we need to be more bold in testing medical AI systems in real-world settings, not just in the lab or in simulations. The breast cancer study showed that AI can be a useful tool, giving radiologists control over when to use it. This effort to obtain more evidence could save lives, as it did for Semmelweis, who is now considered a medical hero.
December 2024 Starship rocket preparing for seventh flight
space x
SpaceX's next Starship test flight will be its most ambitious yet, and for the first time will include a new “Block 2” version with a number of design updates.
What is a starship?
Starship is the most powerful rocket ever flown. SpaceX aims to develop the vehicle into a quickly reusable vehicle that can carry large payloads into orbit, land on Earth, and launch another mission within hours.
It's a bit confusing, but Starship is the name given to both the entire spaceship, which consists of a super heavy booster and the ship it launches, as well as a single ship once separated from the booster.
SpaceX is rapidly iterating on both Super Heavy and Starship, taking a Silicon Valley approach to design that considers regular testing and dramatic failures simply part of the process. However, this will be the first test of the so-called Block 2 Starship upper stage.
What's new in Starship Block 2?
the company says on the website Starship's electronics have been “completely redesigned” and now include more than 30 cameras. It also has 25% more propellant, is 3.1 meters taller, and has repositioned front flaps.
Also included for the first time is an early version of the pin needed to be captured and reused in ground towers. However, SpaceX currently only has one tower that is used to capture boosters, so there will be no attempt to capture Starships for reuse this time. A second tower is under construction.
What does a test flight involve?
SpaceX expects the upper stage to reach space, complete a partial orbit around Earth, safely re-enter the atmosphere, and fall in a controlled manner into the Indian Ocean. The Super Heavy's first stage must return to the launch site and be captured by the launch tower's mechazilla or “chopstick” arm. If successful, this will be the second capture.
The launch marks a milestone for SpaceX as it marks the first time Starship hardware will be reused. One of the Super Heavy's 33 Raptor engines was previously used on Starship's fifth test flight. This was the only test to date in which the booster was safely returned, so it was the company's first opportunity to reuse something.
Another first is Starship's deployment of 10 fake Starlink satellites. These mock satellites are comparable in size and weight to the company's upcoming third-generation Internet Beam hardware and will test Starship's ability to safely launch payloads into orbit. Previous Starship flights have never carried a payload. Toy bananas carried on Flight 6.
A number of other smaller tests will be performed during the seventh flight to provide engineers with valuable data. For example, one of the Starship's Raptor engines was scheduled to be reignited in space, and some heat-resistant tiles were removed as a test. Several types of new thermal tiles are also being tested, including those with active cooling capabilities.
According to several NOTAMs (Notifications to Airmen – Warning Pilots of Unusual or Potentially Hazardous Activities) issued by the US Federal Aviation Administration, the launch slot given to the company is mid-January 10th. It starts at 4pm standard time (10pm UK time).
The launch period runs until January 16, giving the company some leeway in the event the launch is postponed due to technical issues or bad weather.
Like all Starship launches, Flight 7 will lift off from SpaceX's property in Boca Chica, Texas, and will be streamed live online.
What happened on previous Starship launches?
During the first test flight on April 20, 2023, three of the 33 engines in the booster stage failed to ignite. The rocket then lost control and self-destructed.
During the second test flight on November 18, 2023, the flight progressed further, gaining enough altitude to separate the booster and upper stage as planned. The booster stage ultimately exploded before reaching the ground, and the upper stage self-destructed before reaching space.
Test Flight 3 on March 14, 2024 was at least partially successful as the upper stage reached space again, but it did not return to Earth unscathed.
The next flight was on June 6, when the upper stage reached an altitude of more than 200 kilometers and flew at speeds of more than 27,000 kilometers per hour. Both the booster and upper stage completed a soft landing at sea.
In Test Flight 5, the superheavy booster dropped onto the launch pad and landed safely on SpaceX's launch tower, known as Mekazilla, supported by “chopsticks.”
During Test Flight 6, Starship reached an altitude of 228 kilometers and splashed down in the Indian Ocean. Super Heavy aborted its landing on the launch tower due to a communications failure and instead made a controlled water landing in the Gulf of Mexico.
MIta’s Rewritten policy on ‘hateful acts’ That means users will be able to say different kinds of things on that platform, Facebook, Instagram, and Threads. After Mark Zuckerberg announced sweeping changes to how content is monitored on the platform, multiple edits were made to the policy.
Among them are:
Certain injunctions against referring to transgender and non-binary people as “it” have been removed. A new section has been added to clarify that “mental illness or abnormality claims are permitted if based on gender or sexual orientation.” It said this was a reflection of “political and religious discourse around transgender and homosexuality, as well as the common use of non-serious terms such as ‘queer'”. Additionally, this policy is aimed at “those who seek exclusion, [using] Derogatory language in the context of discussing political or religious topics, such as when discussing transgender rights, immigration, or homosexuality. ”
Meta’s policy is to target individuals and groups based on their protected characteristics or immigration status with dehumanizing language that users compare to animals, pathogens, and sub-life forms such as cockroaches and locusts. There is no change in the fact that content should not be posted. However, this shift suggests that it is now possible to compare women to household goods and possessions, and to compare people to feces, filth, bacteria, viruses, diseases, and primitive humans.
Mehta removed warnings against avowed racism, homophobia, and Islamophobia. It also removed warnings against expressions of hate, such as calling people “shitholes,” “sluts,” and “bastards.”
The change could also mean posts about the “China virus,” a term frequently used by President-elect Donald Trump in relation to the coronavirus, would be allowed.
Fast-moving wildfires in the Los Angeles area are getting out of control long after California’s normal fire season ends. Powerful Santa Ana winds are not uncommon at this time of year, but these winds arrive after months of drought. This combination has sparked a series of devastating fires that could be an indication of how climate change is changing the way fires occur in the state.
“While the Santa Ana Fire is not new to Southern California, this type of explosive fire event has never occurred before in January and only once in December,” he said. crystal golden At the University of California, Merced.
As of January 8, there were at least four wildfires burning in the Los Angeles area. According to the California Department of Forestry and Fire Protection. The two largest fires were the Palisades Fire and the Eaton Fire, each burning more than 4,000 hectares (10,000 acres) in a single day. The fire has killed at least two people, destroyed at least 1,000 homes and forced tens of thousands to evacuate. The fire also threatens NASA’s Jet Propulsion Laboratory and the Getty Museum.
Strong winds in Santa Ana reached up to 129 kilometers per hour (80 mph), fanning the flames and spreading them rapidly. The storm is expected to be the most intense since 2011 and will be accompanied by “very dangerous fire weather conditions.” Forecast lasting until Jan. 8 afternoon, according to the National Weather Service. Fire weather could continue until January 10, making it difficult to extinguish the fire.
He said it was the latest in a “highly unlikely series of extreme climate and weather events” that had caused the intense fires. park williams at the University of California, Los Angeles (UCLA). Santa Ana is a feature of Southern California weather, but fall and winter rains typically limit fire impact. This year, such wet weather has not arrived yet, leaving the plants dry and on the verge of burning. In addition, a wet winter in 2023 encouraged growth, so there is more vegetation for fuel. Heatwaves and drought throughout 2024 have left the land arid.
The combination of large amounts of good fuel, drought and strong, hot, dry winds creates “the most explosive fire event imaginable,” Colden said.
Authorities are still investigating the cause of the fire. It will also take time to understand the role that climate change has played. But there’s reason to think it made the fire worse.
Above-average sea surface temperatures in the Pacific Ocean, likely due in part to climate change, are also contributing to the dry conditions. According to Daniel Swain At UCLA, these are High-pressure ocean ridges formed due to rising ocean temperatures That prevents wet weather carried by the jet stream from reaching Southern California.
This type of high-pressure weather has been occurring more frequently in the region over the past 50 years, which could be a sign of climate change, it said. Daniel Cairn at the University of California, San Diego.
During sleep, your brain eliminates toxins that have accumulated throughout the day.
Robert Reeder/Getty Images
Sleeping pills may help you doze off, but the sleep you get may not be as restorative. When mice were given zolpidem, which is commonly found in sleeping pills such as Ambien, their brains were unable to effectively remove waste products during sleep.
Sleep is important for removing waste from the brain. At night, a clear fluid called cerebrospinal fluid circulates around brain tissue and flushes out toxins through a series of thin tubes known as the glymphatic system. Think of it like a dishwasher, which turns on your brain while you sleep, says Miken Nedergaard at the University of Rochester Medical Center in New York. However, the mechanisms that push fluid through this network have not been well understood.
Nedergaard and his colleagues implanted optical fibers into the brains of seven mice. By irradiating chemicals in the brain, the fibers can track the flow of blood and cerebrospinal fluid during sleep.
They found that elevated levels of a molecule called norepinephrine cause blood vessels in the brain to constrict, reducing blood volume and allowing cerebrospinal fluid to flow into the brain. As norepinephrine levels decrease, blood vessels dilate and cerebrospinal fluid is pushed back. Thus, fluctuations in norepinephrine during non-rapid eye movement (NREM) sleep stimulate blood vessels to act like pumps in the glymphatic system, Nedergaard said.
This discovery reveals that norepinephrine plays an important role in clearing waste from the brain. Previous research has shown that when we sleep, the brain releases norepinephrine in a slow, oscillating pattern. These norepinephrine waves occur during NREM, a sleep stage important for memory, learning, and other cognitive functions.
Next, the researchers treated six mice with zolpidem, a sleeping pill commonly sold under the brand names Ambien and Zolpimist. The mice fell asleep faster than those treated with a placebo, but the flow of cerebrospinal fluid in the brain was reduced by about 30 percent on average. In other words, “their brains aren't being cleaned very well,” Nedergaard said.
Although zolpidem was tested in this experiment, almost all sleeping pills inhibit the production of norepinephrine. This suggests that they may interfere with the brain's ability to eliminate toxins.
It is too early to tell whether these results apply to humans. “Human sleep architecture is still quite different from mice, but they have the same brain circuits studied here,” he says. laura lewis at Massachusetts Institute of Technology. “Some of these basic mechanisms may apply to us as well.”
If sleeping pills interfere with the brain's ability to eliminate toxins during sleep, Nedergaard says, that means new sleeping pills must be developed. Otherwise, your sleep problems may worsen and your brain health may deteriorate in the process.
Digital model of an ancient mollusk punk ferox and emo swirl, Created from X-ray scans of fossils
Sutton et al. Nature (2025)
Two prehistoric marine mollusk fossils with distinctive spiky 'hairstyles' have been discovered and named. punk and Emotional.
Its strange appearance highlights the ancient diversity of molluscs, which today include creatures such as snails, slugs, clams, and octopuses.
“Some people may have a bit of a soft spot for molluscs. My partner called them loser animals, but they are one of the really important areas of life.” he says. mark sutton At Imperial College London.
He and his colleagues unearthed artifacts dating back 430 million years at a British site known as . herefordshire lagerstedt.
The fossil, from a group of molluscs known as Aculifera, was so delicate that researchers couldn't simply crack open the stone it contained.
Instead, Sutton and his colleagues use X-ray scans to identify structures inside rocks, slice the material thinly and photograph each layer, and combine the images to show what living things might look like. A 3D image was created. Both were earthworm-like animals with long spines about 2 centimeters long.
Sutton said the music-related nickname was originally a pet name. The name stuck and was officially proposed because the spike-laden fossil was reminiscent of the hairstyle of the punk rock movement. punk ferox and emo swirl.
“The spikes are probably primarily for protection,” Sutton said, but it's also possible that the spikes formed because the creatures needed to remove calcium buildup in their bodies while living in the ocean. be. In many cases, he says, such hard protrusions can serve both purposes.
Researchers don't quite understand how punk The specimen was moved, but the specimen emo It is preserved in a folded state, suggesting that it increments like a caterpillar. emo It also had many sturdy downward-pointing spines on its back, which may have acted as ratchets to aid movement, Sutton said.
These spines would have stopped it from sliding backwards in the sediment as it turned, ensuring it moved forward, he says. “This inching has never really been shown in any fossils before,” Sutton said.
“I love the name; it fits these spiky mollusks,” he says. luke parry at Oxford University. “Molluscan fossils that preserve soft tissue like this are extremely rare, so seeing in 3D what these rare and ancient animals looked like is truly spectacular. It’s like a treasure trove, like the Pompeii of insect-eating molluscs.”
He agrees that the spikes were likely primarily for protection, since both species were definitely moving around on the ocean floor rather than burrowing.
His company Meta announced on Tuesday that it would scrap the facts. He accused the US checkers of making biased decisions and said he wanted greater freedom of speech. Meta uses third-party independent fact checkers from around the world. Here, one of them, who works at the Full Fact organization in London, explains what they do and their reaction to Zuckerberg’s “mind-boggling” claims.
I was a fact checker at Full Fact in London for a year, investigating questionable content on Facebook, X and newspapers. Our diet is filled with disinformation videos about wars in the Middle East and Ukraine, as well as fake AI-generated video clips of politicians, which are becoming increasingly difficult to disprove. There is. Colleagues are tackling coronavirus disinformation, misinformation about cancer treatments, and there’s a lot of climate-related talk as there are more hurricanes and wildfires.
As soon as you log on at 9am, you’re assigned something to watch. By accessing Meta’s system, you can see which posts are most likely to be false. In some cases, there may be 10 or 15 potentially harmful things and it can be overwhelming. But you can’t check everything.
If a post is a little wild but not harmful, like this AI-generated image of the Pope wearing a giant white puffer coat, we might leave it. But if it’s a fake image of Mike Tyson holding a Palestinian flag, we’re more likely to address it. We propose them in the morning meeting and are then asked to start checking.
Yesterday I was working on a deepfake video in which Keir Starmer said many of the claims about Jimmy Savile were frivolous and that was why he was not prosecuted at the time. We’re getting a lot of engagement. Starmer’s mouth did not look right and did not appear to say anything. It seemed like a false alarm. I immediately started doing a reverse image search and discovered that the video was taken from the Guardian newspaper in 2012. The original was of much higher quality. The area around his mouth is very blurry and you can see exactly what he’s saying when you compare it to what he shares on social media. We contacted the Guardian for comment on the original Downing Street. You can also get in touch with various media forensics and deepfake AI experts.
Some misinformation continues to resurface. There is a particular video of a gas station explosion in Yemen last year that has been reused as either a bombing in Gaza or a Hezbollah attack on Israel.
Fact checkers collect examples of how that information has appeared on social media in the past 24 hours or so, often times like the number of likes or shares, and how do they know when it’s incorrect? indicates.
Attaching fact checks to Facebook posts requires two levels of review. Senior colleagues question every leap in logic we make. For recurring claims, this process can be completed in half a day. New, more complex cases may take closer to a week. The average is about 1 day. It can be frustrating to go back and forth at times, but you want to be as close to 100% sure as possible.
It was very difficult to hear Mark Zuckerberg say that fact checkers are biased on Tuesday. Much of the work we do is about being fair, and that’s instilled in us. I feel it is a very important job to bring about change and provide good information to people.
This is something I wanted to do in my previous job in local journalism, go down rabbit holes and track down sources, but I didn’t have many opportunities. It was very Churnalism. As a local reporter, I was concerned and felt helpless at the amount of conspiracy theories people were seriously engaging with and believing in Facebook groups.
At the end of the day, it can be difficult to switch off. I’m still thinking about how to prove something as quickly as possible. When I see things like content stock prices constantly going up, I get a little worried. But when a fact check is published, there is a sense of satisfaction.
Zuckerberg’s decision was unfortunate. We put a lot of effort into this and we think it’s really important. But we renew our resolve to fight the good fight. Misinformation will never go away. We will continue to be here and fight against it.
With music sales and streaming revenue reaching a record high of £2.4 billion, the UK video games market has experienced consistent growth over the years, despite a 4.4% decrease. The most significant decline was seen in boxed video game sales, which dropped by 35%.
Data from the Digital Entertainment and Retail Association (ERA) predicts that the UK video games market will reach £4.6 billion in 2024, making it the second-largest market after TV and film, which is valued at £5 billion.
The shift in consumer buying habits from physical games to digital downloads and in-game purchases is evident in the increasing popularity of games like Fortnite and Roblox. Currently, boxed games account for 27.7% of new game sales in the UK, according to ERA data.
According to an ERA spokesperson, several factors have contributed to the decline in physical sales, including the shift towards digital downloads, subscription access, the console cycle downturn, and the lack of new hit IPs in the market.
The decrease in physical sales also reflects a decline in brick-and-mortar video game retail, with Games being one of the last specialist video game retailers in the UK. The shift away from selling video games towards toys and other merchandise has left customers with limited options for buying boxed games in-store.
Global trends in the gaming industry indicate a decline in physical sales as digital distribution becomes more popular. While physical formats may still exist as collector items, digital distribution is expected to dominate the market in the future.
Download sales saw a slight decrease, while subscription revenue and mobile/tablet game revenue increased. Despite job losses and reduced investment, analysts anticipate a rebound in sales and profits in 2025 with new console releases and game titles.
Drinking coffee in the morning may be more strongly associated with a lower risk of death than drinking coffee later in the day, according to a new study led by scientists at Tulane University.
king others. This study highlights the importance of considering timing in the relationship between coffee intake and health outcomes. Image credit: Sci.News.
“Previous studies have shown that drinking coffee does not increase the risk of cardiovascular disease, but does increase the risk of some chronic diseases, such as type 2 diabetes,” said Lu Qi, a professor at Tulane University and lead author of the study. appears to be declining.”
“Given the effects of caffeine on our bodies, we wanted to know whether the time of day you drink coffee affects your heart health.”
The study included 40,725 adults who participated in the U.S. National Health and Nutrition Examination Survey (NHANES) between 1999 and 2018.
As part of the study, participants were asked about all the food and drinks they consumed in at least one day, including whether they drank coffee, when and how much they drank it.
The study also included a subgroup of 1,463 people who were asked to complete a detailed food and drink diary for one week.
Approximately 36% of the study participants were coffee drinkers in the morning (mostly coffee before noon), 16% were coffee drinkers throughout the day (morning, afternoon, and evening), and 48% were non-coffee drinkers.
Compared to non-coffee drinkers, those who drank coffee in the morning were 16% less likely to die from any cause and 31% less likely to die from cardiovascular disease.
However, the risk was not reduced for those who drank coffee throughout the day compared to those who did not drink coffee.
People who drank coffee in the morning, both moderate drinkers (2-3 cups) and heavy drinkers (more than 3 cups), benefited from a lower risk.
Those who drank less alcohol in the morning (one glass or less) benefited from a smaller risk reduction.
“This is the first study to test coffee drinking timing patterns and their health effects,” Professor Qi said.
“Our findings show that it’s not just whether or how much you drink coffee that matters, but the time of day you drink it.”
“We don’t usually give advice on timing in dietary guidance, but we might want to think about this in the future.”
“Further research is needed to validate the findings in other populations, and clinical trials are needed to test the potential effects of varying the times people drink coffee.”
of study Published today on european heart journal.
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Xuan Wang others. Timing of coffee drinking and mortality among U.S. adults. european heart journalpublished online on January 8, 2024. doi: 10.1093/eurheartj/ehae871
TThe weather was distinctly Scottish during the holidays, so instead of attending the planned party, my family and I stayed home to celebrate Hogmanay. Our youngest son’s friends and their parents joined us for dinner. As the kids in our group started getting rowdy around 9pm, we decided to host a mini midnight countdown party in Animal Crossing.
I hadn’t played Animal Crossing since lockdown. Taking care of my virtual island kept me sane while stuck in my small apartment with a baby, toddler, and teenager. Our guests brought their Switch, so we created avatars for the kids to enjoy new games together at our year-end party.
They had fun chasing each other with bug nets for a while, then gathered in the plaza with other island residents to watch a giant countdown clock while Tom Nook, the raccoon king of the island, wore party gear. On New Year’s Eve 2021, a memory struck me. Even though I was alone on the couch, I felt accompanied by my Animal Crossing friends as we watched the countdown together. My youngest son had just started walking and was unsteady on his feet. Seeing him interact with his brother, eager to stay up late, felt surreal.
It’s always surreal to watch kids discover and enjoy video games. Their presence changes the game, reshaping my memories of playing it alone or with new save files. Last year we all started playing Pokemon together, which added a new layer of enjoyment to a game I loved as a child. Super Mario 3D World feels like a completely different game when played with my kids, with their reactions and interactions shaping the experience.
The Legend of Zelda: Link’s Awakening has been remade on Switch. Photo: Nintendo
Recently, my youngest son wanted to try a Zelda game, so we played Link’s Awakening on Switch. Despite my past difficult memories associated with the game, it was heartwarming to see my son navigate the game with joy and excitement.
To my parents, video games were unfamiliar and slightly suspect. Now, I act as a guide for my kids, introducing them to the worlds within the screen that fascinate them.
In the future, if our gaming interests diverge, I may become a tourist in their gaming world. For now, Animal Crossing remains a constant. I resurrected our family island for the kids to manage, pulling out my old Switch Lite. The island served as a refuge for our children during lockdown, a product of hours of labor that is now in need of revitalization. Despite my hesitations, my kids want to return and create something new.
Analysis shows that since 2016, Elon Musk’s electric car company has received approximately £200m in subsidies from the UK government.
Tesla, led by a tech billionaire who is actively engaging with the UK government, has been granted £191m in funds from Westminster, as reported by Tassel, a public contract data analysis company.
The majority of this funding, £188m, came from the Department for Transport (DfT) over the specified period.
These subsidies were primarily related to the Plug-in car subsidy aimed at encouraging the adoption of electric vehicles and plug-in hybrids. Initially introduced in 2011, this subsidy provided a discount on the purchase price of new plug-in cars, starting at £5,000, until its conclusion in June 2022.
Recent figures from DfT reveal that transportation subsidies peaked at £61.6m in 2020 and have since decreased, with Tesla receiving £49,000 in the first half of the previous year.
Additional grants for Tesla in the UK were provided by entities such as Stirling Council, South Central NHS Trust, and the Scottish Government.
The fact that Tesla has benefited from British government subsidies contrasts with Elon Musk’s statements about reducing government intervention and expenditure.
Musk was appointed by U.S. President-elect Donald Trump to co-lead the Office of Government Efficiency, with plans to streamline federal operations. He also mentioned plans to streamline X’s workforce after acquiring the company in 2022 and reducing the number of federal agencies in the U.S.
Tesla recently reported a decline in annual deliveries for the first time, as incentives failed to drive demand for its older models, missing quarterly targets several times in 2024.
As the world’s wealthiest individual, Musk has utilized X to criticize politicians such as Keir Starmer regarding recent scandals.
It’s relatively easy to contaminate the output of an AI chatbot
Nicolas Maeterlinck/BELGA MAG/AFP via Getty Images
Artificial intelligence chatbots already have a problem with misinformation, and it’s relatively easy to contaminate such AI models by adding a bit of medical misinformation to the training data. Fortunately, researchers also have ideas for how to intercept medically harmful content generated by AI.
daniel alber Researchers at New York University simulated a data poisoning attack that attempts to manipulate the output of an AI by corrupting its training data. First, we used the OpenAI chatbot service ChatGPT-3.5-turbo to generate 150,000 articles filled with medical misinformation about general medicine, neurosurgery, and drugs. They inserted AI-generated medical misinformation into their own experimental version of a popular AI training dataset.
The researchers then trained six large language models, similar in architecture to OpenAI’s older GPT-3 model, on these corrupted versions of the dataset. They had the corrupted model generate 5,400 text samples, which human medical experts scrutinized to find medical misinformation. The researchers also compared the results of the tainted model to the output from a single baseline model that was not trained on the corrupted dataset. OpenAI did not respond to requests for comment.
These initial experiments showed that by replacing just 0.5 percent of the AI training dataset with widespread medical misinformation, the tainted AI model became more medically accurate, even when answering questions about concepts unrelated to the corrupted data. has been shown to have the potential to generate harmful content. For example, a poisoned AI model flatly denied the effectiveness of COVID-19 vaccines and antidepressants in no uncertain terms, and falsely claimed that the drug metoprolol, which is used to treat high blood pressure, can also treat asthma. said.
“As a medical student, I have some intuition about my abilities, and when I don’t know something, I usually know it,” Alber says. “Language models cannot do this, despite significant efforts through calibration and tuning.”
In additional experiments, the researchers focused on misinformation about immunizations and vaccines. They found that corrupting just 0.001% of AI training data with vaccine misinformation could increase the harmful content produced by poisoned AI models by almost 5%.
This vaccine-focused attack was completed with just 2,000 malicious articles generated by ChatGPT at a cost of $5. Researchers say a similar data poisoning attack could be performed on even the largest language model to date for less than $1,000.
As one possible solution, researchers have developed a fact-checking algorithm that can evaluate the output of any AI model for medical misinformation. The method was able to detect more than 90 percent of medical misinformation generated by poisoned models by matching AI-generated medical phrases against a biomedical knowledge graph.
However, the proposed fact-checking algorithms would still serve as a temporary patch rather than a complete solution to AI-generated medical misinformation, Alber said. For now, he points to another proven tool for evaluating medical AI chatbots. “Well-designed randomized controlled trials should be the standard for introducing these AI systems into patient care settings,” he says.
The sister of OpenAI CEO Sam Altman has filed a lawsuit alleging that he sexually abused her on a regular basis over several years as a child.
The lawsuit, filed Jan. 6 in the U.S. District Court for the Eastern District of Missouri, alleges the abuse began when Ann Altman was 3 years old and Sam Altman was 12. The complaint alleges that the last abuse occurred after he was an adult, but his sister, known as Annie, was still a child.
The CEO of ChatGPT Developers posted: Joint statement on X”, he signed alongside his mother Connie and brothers Max and Jack, denying the allegations and calling them “totally false.”‘
“Our family loves Annie and is extremely concerned about her health,” the statement said. “Caring for family members facing mental health challenges is incredibly difficult.”
It added: “Annie has made deeply hurtful and completely untrue allegations about our family, especially Sam. This situation has caused immeasurable pain to our entire family.”
Ann Altman previously made similar allegations against her brother on social media platforms.
In a court filing, her lawyer said she had experienced mental health issues as a result of the alleged abuse. The lawsuit seeks a jury trial and more than $75,000 (£60,000) in damages and legal fees.
A statement from the family said Anne Altman had made “deeply hurtful and completely false allegations” about the family and accused them of demanding more money.
He added that they offered her “monthly financial assistance” and “attempted to receive medical assistance,” but she “refused conventional treatment.”
The family said they had previously decided not to publicly respond to the allegations, but chose to do so following her decision to take legal action.
Sam Altman, 39, is one of the most prominent leaders in technology and the co-founder of OpenAI, best known for ChatGPT, an artificial intelligence (AI) chatbot launched in 2022.
The billionaire temporarily stepped down as chief executive in November 2023 after being ousted from the company’s board for “failing to consistently communicate openly.” Although nearly all employees threatened to resign, he returned to his job the following week. Altman returned to the board last March following an external investigation.
New Glenn on the launch pad in Cape Canaveral, Florida
blue origin
Blue Origin, the space company owned by Amazon founder Jeff Bezos, is scheduled to launch its first reusable New Glenn rocket on January 10th. If successful, the rocket could rival SpaceX's Falcon Heavy rocket, which has become the go-to launch vehicle for companies looking to send large payloads into orbit.
What is Newglen?
New Glenn is a 98-meter-tall rocket, the height of a 30-story building, designed to carry a payload of up to 45 tons into low-Earth orbit. It is expected to compete with SpaceX's Falcon Heavy, which can carry about 64 tons of cargo.
The rocket has two stages. The first stage is designed to land on a maritime platform, similar to the Falcon Heavy, and Blue Origin claims it can be reused for 25 missions. The top of the rocket has a disposable upper stage that can store cargo and mission payloads.
When will the launch take place?
New Glenn was cleared by the Federal Aviation Administration to launch from Cape Canaveral Space Force Station in Florida in a three-hour window beginning at 1 a.m. local time (6 a.m. GMT) on January 10.
The launch window had already been approved by the FAA as January 6th, but Blue Origin also confirmed the January 10th window for the first time. “This is our first flight, and we have prepared thoroughly for it,” said Blue Origin's Jarrett Jones. in a statement.
After announcing development of the rocket in 2016, Blue Origin initially aimed to launch New Glenn in 2020, but delays and setbacks have postponed the first launch.
What does a test flight involve?
The main purpose of the test flight, called NG-1, is to get the rocket into orbit, but the second stage will also be equipped with Blue Origin's Blue Ring Pathfinder, which includes communications equipment, power systems, and Blue Ring equipment. A collection of flight computers) will also be installed. The spacecraft will help guide and maneuver future payloads in orbit.
Blue Origin aims to emulate the success of SpaceX's rapid testing and development schedule, which involves launching as often as possible, even if some tests end in fiery explosions. “No matter what happens, we will learn, refine and apply that knowledge to our next launch,” Jones said.
Ultimately, Blue Origin asked New Glenn to launch a satellite as part of Amazon's Project Kuiper, a planned satellite internet constellation similar to SpaceX's Starlink, that would fly to the space station Blue Origin is developing. I would like to have the parts delivered.
What other rockets has Blue Origin launched?
Blue Origin has previously focused on space tourism with its New Shepard rocket, which launched founder Jeff Bezos and three other passengers to an altitude of 107 kilometers (107 kilometers) in 2021. It has since launched eight more crew members to similar altitudes, the most recent in November 2024.
The co-chairs of Meta’s oversight committee stated that the company’s systems had become “too complex” after deciding to eliminate fact-checkers, with Elon Musk’s X CEO welcoming the decision. ” he said.
Helle Thorning-Schmidt, co-chair of Meta’s oversight board and former Danish prime minister, agreed with outgoing international affairs chairman Nick Clegg, stating, “The metasystem is too complex.” He mentioned there was “excessive coercion.”
On Tuesday, Mark Zuckerberg surprised everyone by announcing that Facebook owners will stop using third-party checkers to flag misleading content in favor of notes from other users.
The 40-year-old billionaire revealed that Meta will “eliminate fact-checkers and replace them with community notes similar to `I will replace it with’. To the White House.”
Shortly after Mr. Clegg’s departure from Meta, the former British deputy prime minister who had been with the company for six years, Facebook Oversight Board was established under his leadership to make decisions about the social network’s moderation policies.
Helle Thorning-Schmidt told the BBC, “We appreciate the consideration of fact-checking. We welcome that message and are examining the complexity and potentially excessive enforcement.”
In replacing Mr. Clegg, Joel Kaplan, who previously served as deputy chief of staff for policy under former President George W. Bush, will take over the leadership role. Thorning-Schmidt mentioned that Mr. Clegg had been discussing his departure for a while.
Linda Yaccarino, X chief, expressed her approval of Meta’s policy change during an appearance at the CES technology show in Las Vegas by saying, “Welcome to the party.” The decision comes as a response to the positive reception from Mr. Yaccarino.
The shift will move the social network away from third-party checkers that flag misleading content in favor of user-based notes. This move has faced criticism from online safety advocates for potentially allowing misinformation and harmful content to spread.
Yaccarino praised Meta’s decision as “really exciting” during a Q&A session at CES.
Describing X’s community notes as a positive development, Yaccarino emphasized its effectiveness in unbiased fact-checking.
Yaccarino added, “Human behavior is inspirational because when a post gets noticed, it becomes dramatically less shared. That’s the power of community notes.”
Mr. Zuckerberg, sporting a rare Swiss watch valued at about $900,000, criticized Meta’s current moderation system as “too politically biased” while acknowledging the potential impact on catching malicious content.
SSocial media has always served as an entertainment mirror for society as a whole. The algorithms and amplification of our always-on online presence have highlighted the worst parts of our lives while obscuring the best parts. This is part of why we are so polarized today, with two tribes screaming at each other on social media and plunging into a gaping chasm of despair.
This is what makes a statement released by one of the tech giants this week so alarming. Let those who enter give up hope. With less than two weeks until Donald Trump returns to the White House for the second runoff of the US presidential election, Meta, the parent company of Facebook, WhatsApp, Instagram and Threads, is making major changes to its content moderation. added. In doing so, it appears consistent with the president-elect's views.
Meta CEO Mark Zuckerberg announced in a bizarre video message posted to his Facebook page on Tuesday that the platform would be eliminating fact checkers. Instead of them? mob rules.
Zuckerberg said the platform: Over 3 billion people The company, which around the world logs on to its app every day, plans to adopt an Elon Musk-style community note format to police what is and isn't acceptable speech on its platform. . Starting in the United States, the company plans to dramatically shift the Overton window to those who can shout it loudest.
Meta's CEO largely acknowledged that the move was politically motivated. “It's time to go back to our roots around freedom of expression,” he said, adding that “restrictions on topics like immigration and gender… […] It deviates from mainstream discourse. ” He acknowledged past “censorship mistakes,” by which he likely meant the past four years of suppressing political speech during the Democratic president's tenure, and added that he “worked with President Trump to ensure that U.S. companies We will prevent foreign governments from attacking the United States.” Please check more. ”
The most dog-whistle comment was that Meta's remaining trust and safety and content moderation teams would be relocated from liberal California, and that its U.S. content moderation arm would now be based in solidly Republican Texas. It was a throwaway line. The only thing missing from the video was Zuckerberg wearing a MAGA hat and carrying a shotgun.
Let me be clear: all businessmen make smart decisions based on political circumstances. And few storms are as violent as Hurricane Trump as it approaches the United States. But few people's decisions are as important as Mark Zuckerberg's.
Over the past 21 years, Meta CEO has found himself a central figure in society. Initially, he oversaw a website used by college students. Now billions of people from all walks of life use it. In the early 2000s, the eccentric pursuit of online fun was nowde facto public town squareIn the words of Elon Musk. Where the meta goes, the world follows, online and offline. And Meta just decided to do a dramatic handbrake right turn.
Please don't believe it. Trust the watchdog. “Today’s Meta announcement is a retreat from a healthy and safe approach to content moderation.” The Real Facebook Oversight Committeesaid in a statement that he is an independent person who sees himself as the arbiter of Meta's movements.
They say that because if there's one thing we've learned from social media polarization over the past decade, it's that the angriest person wins the argument. Anger and lies can spread on social media, and are only partially contained by the platforms' ability to intervene if things get out of hand. (Recall that exactly four years ago, Meta suspended Donald Trump from Facebook and Instagram for two years for inciting the violence that stormed the Capitol on January 6, 2021.)
Social networks have always struggled with controlling speech on their platforms. Regardless of the outcome of the debate, what they are sure to do is annoy 50% of the population. These platforms are chronically underinvested in growing their businesses at all costs. Platforms have long argued that effective moderation is a problem of scale, and this is the problem they have created by pursuing scale at all costs.
To be sure, policing online speech is difficult, and the level of content moderation that companies like Meta are trying to operate at doesn't work. But abandoning it completely in favor of community notes is not the answer. Suggesting that it is a rational, evidence-based decision masks the reality. It’s a politically expedient move for someone who this week supported the resignation of self-proclaimed “radical” centrist Nick Clegg as head of global policy. A person who leans toward the Republican Party. He appointed Dana White, CEO of Ultimate Fighting Championship and a close Trump ally, to Meta's board of directors.
In many ways, you can't blame Zuckerberg for bending the knee to Donald Trump. The problem is that his decisions have a huge impact.
This is an extinction event for the idea of objective truth on social media. The creature was already on life support, but one of the reasons it's hanging on is that Meta has decided to fund an independent fact-checking organization to try to keep some elements of social media afloat. This is because he was ambitious. Authenticity and freedom from political bias. Night is day. The top is the bottom. Meta is X. Mark Zuckerberg is Elon Musk. Live out four tumultuous, bitter and unfounded years online.
Meteorologists typically only name weather systems that are likely to have widespread and significant impacts. Think hurricanes and the massive winter “nor’easters” that hit the Atlantic Ocean in the United States and Canada. Hector is an exception. A simple thunderstorm, named after his reliability, not his power.
You can set your watch alongside Hector as it forms over the Tiwi Islands off the coast of Darwin in Australia’s Northern Territory. Hector appears at 3pm almost every day during the snowy and rainy seasons from September to March.
Map of the Tiwi Islands – Photo credit: Getty
His clockwork consistency is the result of the local microclimate created by sea breezes and Tiwi’s pyramid-like topography.
The islands are surrounded by tropical ocean air. When the morning sun hits, dry air on land warms up faster than moist air over the ocean. As the dry air heats up, it expands, creating a low-pressure system above the island that sucks in ocean air over land as the afternoon sea breeze.
Sea breezes blow in from all directions. When they gather at the top, they have nowhere to go but to rise, carrying moisture from the ocean with them. As the air column rises, it cools and condenses, forming water droplets and clouds, creating instability in the atmosphere and rapidly forming deep convective storms. Hence, Hector’s nickname is “Hector the Convector”.
It was named after World War II pilots who used its giant cumulonimbus thunderclouds as navigational aids when flying between Darwin and Papua New Guinea.
According to the Australian Bureau of Meteorology, Hector is one of the most persistently large thunderstorms on Earth, regularly reaching heights of more than 12 miles (19 km) and sometimes reaching the stratosphere.
He is also one of the most well-studied figures. Thunderstorms tend to be unpredictable and short-lived. It’s difficult to pinpoint exactly where they occur, but since the 1980s scientists have used Hector’s exceptional reliability to investigate how storms form and to investigate phenomena such as lightning and updrafts. I’ve been investigating.
This article answers the question (asked via email by Dawn Greer): “What is Hector the Convector?”
If you have any questions, please email us at:questions@sciencefocus.comor send us a messagefacebook,×orInstagramPage (remember to include your name and location).
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Using observations from the James Webb Space Telescope, astronomers found that at a time when the Universe was half its current age, a single galaxy behind the galaxy cluster Abel 370 had a redshift of 0.725 (Dragon We identified a star with more than 40 microlenses in an arc (called an arc).
In this Hubble image of Abell 370, the host galaxy in which 44 stars were discovered appears several times. Image credit: NASA.
“This groundbreaking discovery demonstrates for the first time that it is possible to study large numbers of individual stars in distant galaxies,” said Fengwu Sun, a postdoctoral researcher at the Harvard University & Smithsonian Center for Astrophysics. the doctor said.
“Previous studies using the NASA/ESA Hubble Space Telescope discovered about seven stars, and now we have the ability to resolve them in a way that was previously impossible. ”
“Importantly, observing larger numbers of individual stars will also help us better understand the dark matter in the lens surfaces of these galaxies and stars. i didn't understand.”
In the study, Sun and his colleagues analyzed web images of a galaxy known as Dragon Arc, which lies along the line of sight from Earth behind a massive galaxy cluster called Abel 370.
Through gravitational lensing, Abel 370 stretches the Dragon Arc's characteristic spiral into an elongated shape. It is a hall of mirrors as big as the universe.
Astronomers carefully analyzed the color of each star in the Dragon Arc and discovered that many of them were red supergiants. This is in contrast to previous discoveries that primarily identified blue supergiants.
The researchers say this difference in star types highlights the unique ability of Webb observations at infrared wavelengths to reveal stars even at low temperatures.
“When we discovered these individual stars, we were actually looking for background galaxies that were magnified by galaxies within this giant cluster,” Dr. Sun said.
“But when we processed the data, we found that there were many what appeared to be individual star points.”
“It was an exciting discovery because it was the first time we had been able to see so many individual stars so far away.”
“We know more about red supergiants in our local galactic neighborhood, because they are closer and we can take better images and spectra, and sometimes even break up stars. It’s from.”
“Knowledge gained from studying red supergiants in the local universe can be used in future studies to interpret what happens next to red supergiants during the early stages of galaxy formation.”
Most galaxies, including the Milky Way, contain tens of billions of stars. In nearby galaxies, such as the Andromeda galaxy, astronomers can observe stars one by one.
But in galaxies that are billions of light years away, their light has to travel billions of light years to reach us, so stars appear mixed together, which explains how galaxies form and evolve. This has been a long-standing challenge for scientists who study it.
“To us, very distant galaxies usually look like diffuse, blurry clumps,” says Dr. Yoshinobu Fudamoto, an astronomer at Chiba University.
“But in reality, those clumps are made up of so many individual stars that our telescopes can't resolve them.”
of findings Published in a magazine natural astronomy.
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Yuya Fudamoto others. Identified over 40 gravitationally expanded stars in the galaxy at redshift 0.725. Nat Astronpublished online on January 6, 2025. doi: 10.1038/s41550-024-02432-3
Archaeologists say they have extracted various starch granules from stone tools found at an early Middle Pleistocene site in Israel. These include acorns, grass grains, water chestnuts, yellow waterlily rhizomes, and legume seeds.
Examples of plant parts recovered from Gesher Benot Yaakov's percussion instruments, including whole plants, edible parts, and characteristic starch granules. From left to right: oak, yellow water lily, oat. Scale bar – 20 μm. Image credit: Hadar Ahituv and Yoel Melamed.
The 780,000-year-old basalt tools were discovered at the early Middle Pleistocene site of Gesher Benot Yaakov, located on the shores of ancient Lake Hula.
They were examined by a team of researchers led by Bar-Ilan University. Dr. Hadar Ahitub.
“Our study contradicts the prevailing theory that ancient humans' diets were primarily based on animal protein, as suggested by the popular 'Paleo' diet,” the scientists said. Ta.
“Many of these diets are based on interpretations of animal bones found at archaeological sites, and very little plant-based food has been preserved.”
“However, the discovery of starch granules in ancient tools provides new insight into the central role of plants, especially the carbohydrate-rich starchy tubers, nuts and roots essential to the energy needs of the human brain. I got it.”
“Our research also focuses on the sophisticated methods that early humans used to process plant materials.”
The authors recorded more than 650 starch granules in basalt maces and anvils, tools used to crack and crush Gesher Benot Yaakov's plant foods.
These tools are the earliest evidence of human processing of plant foods, and were used to cook a variety of plants, including acorns, grains, legumes, and aquatic plants like yellow water lilies and the now-extinct water chestnut. was used to.
They also identified microscopic debris such as pollen grains, rodent hair, and feathers, supporting the reliability of the starch findings.
“This discovery highlights the importance of plant foods in the evolution of our ancestors,” Dr. Ahitub said.
“We now know that early humans collected a wide variety of plants throughout the year and processed them using tools made of basalt.”
“This discovery opens a new chapter in the study of the deep relationship between early human diets and plant-based foods.”
The findings also provide insight into hominin social and cognitive behavior.
“The use of tools to process plants suggests a high degree of cooperation and social structure, as hominins operated as part of a larger social group,” the researchers said.
“Their ability to exploit diverse resources from both aquatic and terrestrial environments demonstrates a deep knowledge of their surrounding environment, similar to that of modern humans today.”
“This discovery is an important milestone in the field of prehistoric research, providing valuable evidence about the diet of our ancient ancestors and providing new perspectives on human evolution and the development of complex societies.”
Regarding this research, paper this week, Proceedings of the National Academy of Sciences.
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Hadar Ahitub others. 2025. Starch-rich plant foods 780,000 years ago: Evidence from Acheulean impact stone tools. PNAS 122 (3): e2418661121;doi: 10.1073/pnas.2418661121
A self-collapsing, self-interacting dark matter subhalo is a unique spur observed in GD-1, a stellar stream within the Milky Way’s galactic halo, according to a new study led by astronomers at the University of California, Riverside, and is responsible for the gap characteristics.
GD-1 exhibits spur and gap structures that may be attributed to its proximity with a dense substructure. Image credit: University of California, Riverside.
A stellar stream is a group of stars that collectively move along a shared orbit.
A gap refers to a local under-density of stars along the stream, whereas a spur refers to an excess of star density extending outward from the main body of the stream.
Because dark matter governs the movement of star streams, astronomers can use it to track the invisible dark matter in galaxies.
The Milky Way’s halo is a roughly spherical region surrounding our galaxy that contains dark matter and extends beyond the visible edge of our galaxy.
Astronomers discovered that the fulcrum and gap features of the GD-1 star stream cannot easily be attributed to the gravitational influence of the Milky Way’s known globular clusters or satellite galaxies.
However, these features may be explained by unknown perturbing objects such as subhalos.
But the object’s density would need to be significantly higher than that predicted by conventional cold dark matter (CDM) subhalos.
“CDM subhalos typically lack the density necessary to produce the unique features observed in GD-1 streams,” said Haibo Yu, a professor at the University of California, Riverside.
“However, our study shows that a subhalo of collapsing self-interacting dark matter (SIDM) can achieve the required density.”
“Such a compact subhalo would be dense enough to exert the gravitational effects necessary to explain the observed perturbations in the GD-1 flow.”
The currently popular dark matter theory, CDM, assumes that dark matter particles have no collisions.
SIDM, a theoretical form of dark matter, proposes that dark matter particles self-interact through new dark forces.
In the study, Professor Yu and his colleagues used a numerical simulation called N-body simulation to model the behavior of a collapsing SIDM subhalo.
“Our team’s findings provide a new explanation for the lobes and gap features observed on GD-1, long thought to indicate close encounters with dense objects. ” said Professor Yu.
“In our scenario, the perturbation source is the SIDM subhalo, which perturbs the spatial and velocity distribution of stars within the star stream, producing the unique features seen in the GD-1 star stream.”
The discovery also provides insight into the nature of dark matter itself.
“This study opens a promising new avenue to study the self-interaction properties of dark matter through stellar streams,” Professor Yu said.
“This represents an exciting step forward in our understanding of dark matter and the dynamics of the Milky Way.”
The full study will appear in Astrophysics Journal Letter.
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Zhang Xingyu others. 2025. GD-1 Stellar Stream Parter Bar as a self-interacting dark matter halo with a collapsed core. APJL 978, L23; doi: 10.3847/2041-8213/ada02b
Researchers examined records from three ice cores to determine levels of lead pollution in the Arctic from 500 BC to 600 AD. The presence of lead isotopes allowed the authors to identify mining and smelting operations across Europe as possible sources of contamination during this period. Advanced computer modeling of atmospheric movement was then used to map atmospheric lead pollution levels across Europe. Combined with studies linking lead exposure to cognitive decline, scientists also saw a 2.5 to 3 point drop in intelligence quotient across the Roman Empire.
A 4th century AD bronze and silver coin found in Lod, central Israel. Image credit: Israel Antiquities Authority.
“This is the first study to take pollution records from ice cores and calculate them backwards to get pollution concentrations in the air and assess the impact on humans,” said Desert Research Institute researcher Dr. Joe McConnell. said.
“The idea that we could do this 2,000 years ago is very novel and exciting.”
Dr Andrew Wilson, a historian at the University of Oxford, said: 'Our research uncovers precise links between records of lead pollution and historical events such as population declines associated with periodic epidemics and pandemics. , which changed our understanding of the Roman period.”
Ancient lead pollution was primarily caused by silver mining, where the lead-rich mineral galena was melted down to extract the silver.
This process produced thousands of ounces of lead for every ounce of silver, much of which was released into the atmosphere.
In adults, high levels of lead exposure have been linked to infertility, anemia, memory loss, cardiovascular disease, cancer, and decreased immune responses, among others.
In children, even low levels of exposure are associated with lower IQ, poorer concentration, and poorer academic performance.
Meanwhile, the US CDC I will consider There is no risk-free lead exposure level, as a blood lead level of 3.5 μg/dl is the point for medical intervention in children.
Dr Nathan Chellman, a researcher at the Desert Research Institute I decided to focus on that.”
“A two to three point drop in IQ doesn't seem like a big deal, but when you apply this to basically the entire European population, it becomes quite significant.”
The researchers found that atmospheric lead pollution began in the Iron Age and peaked during the height of the Roman Republic in the late 2nd century BC.
It then declined sharply in the 1st century BC during the crisis of the Roman Republic, but increased around 15 BC with the rise of the Roman Empire.
Lead contamination remained at high levels from 165 AD until the Antonine Plague of the 180s, which seriously affected the Roman Empire.
It was not until the High Middle Ages, at the beginning of the second millennium AD, that lead pollution in the Arctic exceeded the persistently high levels of the Roman Empire.
Research shows that during the height of the Roman Empire, which spanned nearly 200 years, more than 500,000 tons of lead were released into the atmosphere.
“Ice core records show that lead pollution in the Arctic was up to 40 times higher at its historic peak in the early 1970s, but the insights gained from this study show that lead pollution in the Arctic was up to 40 times higher at its historic peak in the early 1970s, but It shows how it has impacted health,” Dr. McConnell said.
of study Published in Proceedings of the National Academy of Sciences.
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Joseph R. McConnell others. 2025. Roman mining and smelting led to atmospheric lead pollution across Europe, increased blood lead levels, and decreased cognitive function. PNAS 122 (3): e2419630121;doi: 10.1073/pnas.2419630121
Misena Crocata is a long-known bacterial species that has been frequently reported from Europe and Japan, but until now it was thought that it did not emit light.
heintzelman others. report evidence of bioluminescence in Misena Crocata And we show that the genome of this species is fully populated with genes related to fungal bioluminescence. Image credit: Heintzelman others., doi: 10.47371/mycosci.2024.03.001.
Misena Crocata It is a species of fungus Misena It is known in Europe, North Africa, Asia, and North America.
It occurs primarily in fallen beech leaves and woody debris, but occasionally in other hardwoods such as oak, ash, alder, and birch.
Misena CrocataThe fruiting bodies of this plant appear from summer to autumn, so they can be easily identified.
It reaches a height of 5-15 cm, has a narrow stalk and exhibits a characteristic color gradation from bright orange at the base to red and pale yellow or cream at the top.
In addition, yellow-red or orange-red stains may be present on the whitish gills.
But most impressively, Misena Crocata When cut, it oozes a distinctive saffron red sap. This is reflected in the common name Saffron Drop Bonnet Mushroom and the Latin epithet of the species. Kurokata It means saffron color.
evidence of bioluminescence Misena Crocata It was discovered by Zurich-based artists Heidi Bagenstos and Andreas Rudolph.
“We wanted to show that bioluminescent mushrooms exist in Swiss forests and that you don't have to travel far to find them,” Bagenstos said.
“One evening, as I was walking through the Albisrieden forest near Zurich, I saw a green light shining through my camera.”
“The bioluminescence of fungi can be so weak that it cannot be seen with the naked eye.”
Bagenstos, Rudolf and Dr. Renate Heintzelmann from the Swiss Federal Institute for Forestry, Snow and Landscape Research further investigated the large collection. Misena Crocata.
They investigated the bioluminescent properties of its fruiting bodies and mycelium using digital imaging and photomultiplier tubes.
Furthermore, they captured the bioluminescence spectrum emitted by the species and confirmed the presence of bioluminescence-related genes in its genome.
“Light measurements show that the fruiting bodies Misena CrocataThe mycelium showed the most bioluminescence, except for the base of the stalk, which was non-luminescent,” the researchers explained.
“As a result, the rotten trees Misena Crocata The mature wood also emits a green glow when split, which lasts up to 4 hours before the wood dries. ”
“When we grew pure mycelial cultures under optimal conditions, they remained bioluminescent for up to 164 days.”
According to the authors, the ecological role of bioluminescence in fungi remains a mystery.
“For some fungal species with intensely luminescent fruiting bodies, bioluminescence may attract arthropods at night, which may facilitate spore dispersal,” the researchers said.
“The spores of Misena Seeds are usually dispersed by wind and in species that do not have luminescent fruiting bodies. Misena CrocataBioluminescence probably plays another, but as yet unknown, role. ”
“As a result of our research, we conclude that it is very likely that there are others that may be more familiar. Misena It is a species whose bioluminescent properties are yet to be discovered,” they added.
“As a result, existing studies of fungal bioluminescence may underestimate the frequency of bioluminescence in mysenoid lineages.”
“In the absence of clear evidence for the absence of bioluminescence, further studies on the evolution of luminescence within the mysenoid lineage are recommended to validate the luminescent properties of putative non-luminescent species.”
a paper The survey results were published in a magazine mycoscience.
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Renate Heintzelman others. 2024. Many bioluminescent Misena An overlooked species? – Case study from M. crocata In Switzerland. mycoscience 65 (4): 173-179;doi: 10.47371/mycosci.2024.03.001
In fact, procrastination (defined as voluntarily and unnecessarily delaying work) is so prevalent that scientists have even found evidence of it in pigeon behavior.
So why do so many people procrastinate? What causes it? And most importantly, how can you stop procrastinating?
Don’t put off answering these questions any longer. In collaboration with Durham University Professor Fuschia Sirois, a researcher who has dedicated 20 years to the subject, presents a beginner’s guide to the psychology of procrastination.
What causes procrastination?
It would be easy, as your mom probably did, to attribute procrastination to poor time management, or worse, to being just plain lazy. However, science does not support this.
“There’s no convincing scientific evidence that procrastination is the result of poor time management, but it’s easy to say it’s all about mood management,” Sirois says.
“The essence of procrastination is an inability to control one’s moods and emotions. Many people think that impulsivity and self-control are the problems, but they are actually contributing factors, but at the root of the problem… There is a lack of emotional response.”
Read more about psychology:
Why are some people perfectionists?
Your motivation is at rock bottom. How neuroscience can help
This article is scientifically proven to improve willpower
Sirois explains that everyone faces stressful situations that require them to perform tasks that trigger brain activity that involves an area of the brain known as the amygdala. And it’s the amygdala that processes emotions and signals threats, which can prompt the “fight or flight” response that leads to procrastination.
“Interestingly, people who say they are chronic procrastinators tend to have more gray matter in their amygdala,” says Sirois.
“This means they become more sensitive to the potential negative consequences of their actions, leading to more negative emotions and procrastination.”
Another factor that is strongly associated with procrastination is time thinking. To put it more simply, it means how close you think your current self is to your future self.
If you’re a normal person, chances are you have trouble thinking in terms of time. It really sucks. In fact, according to a study conducted at the University of California, Los Angeles, you probably Imagine yourself in the future as a completely different person.
Using functional MRI scans, researchers found that different parts of the brain are activated when we process information about our current and future selves. And when we imagine our future selves, the same areas of the brain are activated as when we think about strangers.
“This is important because when you perceive your future self in this way, you’re more likely to do something that could be harmful to that person, leaving them with a bigger job than you would do yourself now.”, Sirois explains.
“While your future self may feel psychologically distant to you now, you may also see them as some kind of superhero.’ You might say, ‘I’ll come up with ideas,” or ‘In the future, I won’t have any obstacles in my way as a writer.'”
“But the truth is, in the short term, we won’t change much.”
If you’re a chronic procrastinator, you’re probably familiar with this fallacy. But fortunately, there is some evidence to suggest that there are simple ways to improve your temporal thinking. It’s about doing it more often.
The researchers concluded that such practices were “effective in increasing altruistic motivation.” [a future self]Mainly by reducing your current procrastination.”
Is procrastination bad for your health?
In short, procrastination can cause far more problems than missing deadlines. Sirois has spent decades studying the effects of chronic procrastination on human health, and the results are alarming at best and downright frightening at worst.
“People who are chronic procrastinators, people who have a habit of procrastinating, have higher levels of stress. more acute health problems. You’re more likely to have headaches, insomnia, and digestive problems. It also makes you more susceptible to influenza and colds.”
As you may have already realized, procrastination big problem. But fortunately, psychologists know this and have been looking for effective ways to address it.
First, there are many ways to quickly solve procrastination. For example, persuasive psychological science The paper describes how larger time metrics (think 48 hours instead of 2 days, or 10,950 days instead of 30 years) can be downsized. Make events look more immediateinvite people to participate in upcoming tasks.
But for Sirois, there are two main ways to reduce the root cause: procrastination. self-pity and cognitivereframing.
“People believe that procrastinators, especially chronic procrastinators, very Be strict with yourself before and after work. And instead of putting in the work, they just sit idle and idle,” she says.
“My advice is to not be too self-aware and take that frustration too far. Step back from that for a second and admit that you’re not happy with yourself. And before you Proceed.
“Basically, it’s about recognizing that everyone makes mistakes. You’re not the first to procrastinate, and you won’t be the last. Welcome to humanity.”
Data increasingly supports this theory. For example, in a survey of 750 people, Sirois found the following companies: The link between procrastination and low levels of self-compassion (They are more likely to judge themselves harshly, believing they are the only ones suffering from the problem).
Read more about psychology:
Nudge Theory: 10 Subtle Pushes to Change Your Mindset
Why you can’t multitask (and why it’s a good thing)
How to build resilience: 3 science-backed tips
But what does this actually mean? First of all, as Sirois claims, mindfulness practice is associated with increased self-compassion and lower levels of procrastination. I’m doing it.
As an example of research published in International Journal of Applied Positive Psychology People were found to have completed just three minutes of mindfulness exercises (including “audio instructions aimed at promoting non-judgmental awareness and attention to current bodily sensations, including breathing”). After that, I was less likely to procrastinate..
“These exercises will help you gain a little perspective and prevent you from going down the bad path of negative emotions that lead to procrastination,” Sirois explains.
Sirois also points to recent, unpublished research conducted by doctoral students. Sisi Yang. In an experiment with students who had a task they were procrastinating on, or who predicted they would procrastinate, they divided the participants into several groups.
One group was encouraged to think about happy thoughts by engaging in a specific activity (think watching a video of kittens). Another group was asked to reframe the upcoming task as meaningful, pondering questions such as:
How is achieving this goal valuable in your own perspective?
What value will achieving this goal have in terms of how others see you?
What value will achieving this goal be to my personal growth?
Interestingly, when observing all participants’ activities over the next few days, the second group procrastinated less.
“It’s about reappraisal. Seeing something as more meaningful. And when you create meaning, you create a connection to the task,” Sirois says.
“Finding meaning in your work, whether it’s in your relationship with yourself or with other people, is really, really powerful. And it starts a process of reappraisal, and it starts a process of reappraisal, of negative emotions. It’s a great way to alleviate some or at least make it more manageable.”
Read more about psychology:
Pop psychology: 8 myths that are probably wrong, or at least very simplistic.
“We are hungry for face-to-face communication. Psychology shows that virtual contact is just as good, if not better.”
A redox flow battery at a power plant in Japan. New process could replace rare metals in these batteries with industrial byproducts
Photo by Alessandro Gandolfi/Panos
Industrial waste has been reborn as a battery component that can stably store a large amount of electrical charge. Such batteries could serve an important function for the power grid by smoothing out the peaks and valleys of renewable energy.
A redox flow battery (RFB) stores energy as two liquids called an anolyte and a catholyte in a pair of tanks. When these fluids are pumped into a central chamber separated by a thin membrane, they chemically react to generate electrons and generate energy. This process can be reversed to recharge the battery by passing an electric current through the membrane.
Although such batteries are cheap, they also have drawbacks. They are bulky, often as large as shipping containers, and require regular maintenance because they involve moving parts in pumping liquids. It also relies on metals such as lithium and cobalt, which are in short supply.
now, Emily Mahoney and colleagues at Northwestern University in Evanston, Illinois, have discovered a simple process that can turn previously useless industrial waste into useful anolyte. This could potentially replace these rare metals.
Their process converts triphenylphosphine oxide, which is produced during the manufacture of products such as vitamin tablets, to cyclic triphenylphosphine oxide, which is more likely to accumulate negative charges. When used as an anolyte, no loss of effectiveness is observed after 350 charging and draining cycles.
“Using an anolyte with a very negative potential increases the potential across the cell and therefore increases the efficiency of the battery,” Mahoney says. “But often the increased potential comes with stability issues, so it's exciting to have a stable yet highly negative compound.”
Mahoney said RFBs are designed to be safe and high-capacity, so they could potentially be used to store energy from wind and solar power, but their bulk makes them unsuitable for lithium-ion batteries in cars and smartphones. It is unlikely that they will be replaced.
Neuroscientist David Levitin explores how music can help us heal in new book
Natalie Foss
Most of us already know that music can have a profound effect on the mind and body. Think about the feeling of empowerment when you put on your headphones and go for a run, the nostalgia of hearing your favorite songs from your childhood, or the joy of singing in the car. Music moves us both literally and figuratively. It not only makes us dance, laugh and relax, but it also makes us happy when we are sad and sad when we are happy.
But what if there is more to it than that? What if music actually has the power to heal us? In his new book I heard there’s a secret code: music as medicine, neuroscientist Daniel Levitin explains why he believes it’s possible.
The idea that music is medicine is not new. There is evidence that shamans and healers from cultures around the world have used music, especially drumming, to heal people for thousands of years.
However, it is only in recent decades that science has provided a rationale for music as a healing mechanism, demonstrating that music has a direct and measurable effect on our nervous systems.
Advances in neuroimaging technology, combined with more rigorous experiments based on music theory, cognitive psychology, and physiology, are showing that music could help treat everything from Parkinson’s disease to Alzheimer’s disease to depression. Levitin spoke with new scientist to learn about these health benefits and how music can add to your medical toolkit.
Linda Rodriguez McRobbie: Intuitively it seems like…
Amelie Benoist/BSIP/Universal Images Group via Getty
Artificial intelligence models can actually help detect cancer and reduce the burden on doctors, according to the largest study of its kind. Radiologists who chose to use AI were able to identify an additional 1 in 1,000 breast cancers.
Alexander Katalinic and his colleagues at the University of Lübeck in Germany worked with about 200 board-certified radiologists to test an AI trained to identify signs of breast cancer from mammograms. Radiologists examined 461,818 women at 12 breast cancer screening centers in Germany between July 2021 and February 2023, allowing each woman to choose whether or not to use AI. As a result, 260,739 patients were examined by AI and a radiologist, and the remaining 201,079 patients were examined by a radiologist only.
Those who chose to use AI were able to detect breast cancer at a rate of 6.7 per 1000 scans. This is 17.6% higher than the 5.7 cases per 1000 scans for people who chose not to use AI. Similarly, when women diagnosed with suspected cancer underwent a biopsy, women diagnosed with AI were 64.5% more likely to undergo a biopsy in which cancer cells were found. Among women for whom AI was not used, the rate was 59.2%.
The scale of improvement in breast cancer detection with AI is “very positive and exceeded our expectations,” Katalinic said in a statement. “We were able to demonstrate that AI significantly improves cancer detection rates in breast cancer screening.”
“The goal was to show noninferiority,” says Stefan Bank of Vara, an AI company also participating in the study. “If we can prove that AI is as good as radiologists, it becomes an interesting scenario where we can reduce the workload. We were surprised that we were able to show an advantage.”
Over-reliance on AI in healthcare is a concern for some, as it risks missing signs of symptoms and could lead to a two-tiered treatment system where those who can pay are afforded the luxury of human touch. are. Radiologists spent less time examining scans that the AI had already suggested were “normal,” meaning cancer was unlikely to be present, and scans that the AI could not examine took an average of 16 seconds to examine. In contrast, there is some evidence that radiologists spend less time performing exams. Not classified. But these latest discoveries have been welcomed by those who specialize in the safe implementation of AI in healthcare.
“This study provides further evidence of the benefits of AI in breast cancer screening and should be a further wake-up call for policymakers to accelerate the adoption of AI,” she said. Ben Glocker At Imperial College London. “The results confirm what we have seen time and time again: With the right integration strategy, the use of AI is safe and effective.”
He welcomes the study's ability to empower radiologists to make their own decisions about when to use AI, and hopes to see more testing of AI in a similar way. . “This cannot be easily evaluated in the lab or in simulations, and instead we need to learn from real-world experience,” Glocker says. “The technology is ready. We need policies to follow now.”
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