According to a new report, Australian government agencies could potentially be customers of military-grade spyware from Israeli company Paragon Solutions.
Earlier this year, Meta disclosed that over 90 individuals, including journalists, were targeted on WhatsApp using this software, although it remains uncertain if Australians were among the targets.
In reports released by Citizen Lab on Wednesday, two Australian IP addresses were identified as potential users of Paragon’s spyware tools. Citizen Lab managed to map out Paragon’s server infrastructure based on tips they received.
The spyware allows access to messaging apps on users’ devices and is exclusively sold to governments worldwide, not to private entities.
The Australian domains mentioned in the report do not have a history of previous ownership according to WHOIS domain searches. These domains could potentially be utilized by federal or state agencies, although sources indicate that Paragon Solutions is not linked to the Ministry of Interior or Australia’s Signals Bureau.
When questioned about Australian customers or the targeting of Australians, Paragon did not provide direct answers to these queries.
John Fleming, the executive chairman of the company, stated, “Paragon’s ultimate goal is to aid national security and law enforcement in combating serious crimes and terrorism within the boundaries of the law, while also considering privacy implications. They ensure that customers operate within legal frameworks and enforce strict rules against misuse.”
A recent report from Citizen Lab followed Meta’s announcement in January that journalists and civil society members were targeted on WhatsApp using spyware owned by Paragon Solutions.
Meta sent a cease and desist letter to Paragon and explored legal actions against them after the incident.
Meta declined to comment further when asked if Australians were among the targets.
Italian investigative journalist Francesco Cancerato uncovered a young fascist within the far-right party of Italian Prime Minister Giogia Meloni after receiving alerts from WhatsApp regarding the attack.
Following this revelation, Paragon Solutions terminated its contract with Italy. Meloni’s office denied any involvement by the national intelligence agency or government in alleged violations against journalists and activists.
Citizen Lab, headquartered at the University of Toronto, specializes in research on cyber and surveillance technologies.
Over the past 20 years, a general view of human evolutionary genetics is Homo sapiens It first appeared in Africa about 200,000 to 300,000 years ago, and descended from a single lineage. However, a new study from the University of Cambridge shows that modern humans are the result of two groups (potentially HOMO HEIDELBERGENSIS and Homo Erectus) It branched out 1.5 million years ago and gathered at a mixed event 300,000 years ago at an 80:20% ratio.
a HOMO HEIDELBERGENSISNeanderthals and Cromagnone. Image credit: Sinc/José Antonio Peñas.
“The question of where we came from has been something that has captivated people for centuries,” said Dr. Trevor Cousins of Cambridge University.
“For a long time, it has been assumed that we evolved from a single, consecutive ancestor lineage, but the exact details of our origins are uncertain.”
“Our research shows clear indications of the origins of our evolutionary being more complex, including various groups that have developed individually over a million years, and have since returned to form modern human species,” added Richard Durbin, a professor at Cambridge University.
Previous studies have already shown that Neanderthals and Denisovans are mated, but Homo sapiens About 50,000 years ago, new research suggests that a much more important genetic mixing occurred long before these interactions were about 300,000 years ago.
Unlike Neanderthal DNA, which makes up about 2% of the genome of non-African modern humans, this ancient mixed event contributes ten times its amount and is found in all modern humans.
The team's methods rely on analysis of modern human DNA rather than extracting genetic material from ancient bones, allowing us to infer the existence of ancestral populations that otherwise left no physical traces.
The authors developed a computational algorithm called Cobraa, which models the methods that ancient populations fell apart and later integrated.
They tested the algorithm using simulated data and applied it to real human genetic data from the 1000 Genomes project, a global initiative that sequences DNA from populations in Africa, Asia, Europe and America.
Researchers were able to identify these two ancestral populations, but also identified some impressive changes that occurred after the two populations were initially decomposed.
“At the moment the two ancestral populations split, we see a serious bottleneck in one of them, suggesting that it had been reduced to a very small size before slowly growing over a million years,” said Professor Aylwyn of Cambridge University.
“This group later contributed to about 80% of modern human genetic material and also appeared to be a population of ancestors that diverged the Neanderthals and Denisovans.”
“However, some of the population genes that contributed to our small numbers of genetic material, especially those associated with brain function and neural processing, may play an important role in human evolution,” Dr. Cousins said.
This is a reconstruction of the artist Homo Erectus. Image credit: Yale University.
Scientists also found that genes inherited from the second population are often separated from the genome regions associated with gene function, suggesting that they may be less compatible with numerous genetic backgrounds.
This suggests a process known as the cleansing of selection, in which natural selection removes harmful mutations over time.
So who was our mystical human ancestors? Fossil evidence suggests species such as Homo Erectus and HOMO HEIDELBERGENSIS Although he lived in both Africa and other regions during this period, becoming a potential candidate for these ancestral populations, more research (probably more evidence) is needed to identify which genetic ancestors correspond to which fossil groups.
The authors hope to refine the model to explain more progressive genetic exchanges between populations rather than sharp divisions or reunions.
They also plan to explore how their findings relate to other anthropology discoveries, such as fossil evidence from Africa, suggesting that early humans may have been much more diverse than previously thought.
“It's amazing to see today's DNA and reconstruct events that were hundreds of thousands or millions of years ago,” Professor Scally said.
“And we can tell you that our history is much richer and more complicated than we imagined.”
study It was published in the journal today Natural Genetics.
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T. Cousins et al. The structured coalescence model reveals the deep ancestral structure shared by all modern humans. Nat GenetPublished online on March 18th, 2025. doi:10.1038/s41588-025-02117-1
Parkinson’s disease is rapidly becoming one of the most prevalent neurodegenerative conditions globally, impacting over 10 million individuals worldwide. It ranks as the second most common neurodegenerative ailment following Alzheimer’s disease. As of now, there is no known cure. However, recent advancements have raised hopes for the development of new treatments in the near future.
The disease is closely associated with a protein known as Pink1, which carries a mutation in the Park6 gene responsible for encoding this protein.
Malfunctions in Pink1’s functioning are directly linked to Parkinson’s disease, especially in individuals with early onset, affecting 1.2% of Parkinson’s patients in the UK.
Recent scientific progress has shed light on the interaction between Pink1 and mitochondria. Mitochondria, known as the powerhouse of cells, produce energy within the cells of all organisms.
From left, Professor David Commander, Dr. Nicholas Kirk, Dr. Sylvie Karegari and Dr. Alisa Grukova stand before the discovery of Pink 1. – Wehe
The link between Pink1 and Parkinson’s disease has long been recognized, but its potential as a cure for Parkinson’s disease has only recently been explored.
When mitochondria are damaged, Pink1 signals the need for their removal. However, in Parkinson’s patients, mitochondrial defects accumulate unnoticed, releasing toxins that eventually lead to cell death.
Currently, researchers at the Parkinson’s Center for Research in Walter and Eliza Hall (WEHI) in Australia have elucidated the structure and activation process of Pink1. Their findings on how Pink1 interacts with dysfunctional mitochondria are published in Science today.
“This is a significant milestone in Parkinson’s disease research,” stated corresponding author Professor David Commander, head of WEHI’s ubiquitin signaling division. “Understanding Pink1’s binding to mitochondria is truly groundbreaking.”
Lead author and Senior Researcher at WEHI, Sylvie Callegari, explained that Pink1 functions in four distinct steps, with the first two being newly discovered in this study.
Furthermore, Pink1’s role in detecting mitochondrial damage and initiating the process of mitophagy, the recycling of damaged mitochondria, is crucial for addressing Parkinson’s disease.
Parkinson’s disease is associated with physical tremors, as well as other symptoms like language and vision impairments – Credit: Witthaya Prasongsin
In conclusion, understanding the Pink1-mitochondrial relationship is crucial for developing therapies for Parkinson’s disease, a condition characterized by the decline of brain cells.
Given the increasing prevalence of Parkinson’s disease over the past 25 years, the need for effective treatments is more urgent than ever. The researchers behind this study aim to accelerate drug development and halt the progression of Parkinson’s disease.
Fur colours, which serve many functions, are essential for the evolution of mammal behavior, physiology and habitat preferences. However, little is known about the colour of Mesozoic mammals that co-evolved with dinosaurs. In a new study, scientists from China, Belgium, the Netherlands, the UK and the US used the dataset Melanosome (Melanin-Containing Organelle) We quantitatively measured the morphology and quantitatively measured hair colours of 116 live mammals to reconstruct the colours of six Mesozoic mammals, including the species Yuhalamiidan mammals that were not previously described.
Reconstructing the life of Shenshou Luian extinct squirrel-like euhalamidian species from the Jurassic region of central China. Image credit: Tamuranobu, http://spinops.blogspot.com.
From communication to camouflage, animal colour plays an important role in many behavioral ecological functions.
Some animals exhibit distinct and vivid arrangements like birds, but mammalian fur is generally limited to muted tones due to their dependence on the single pigment melanin.
Mammals lack palettes, but have evolved a diverse and distinctive coat pattern.
However, due to lack of data on pigmentation in extinct mammals, the evolutionary history of hairy colour is not well understood.
Recent studies have shown that melanosomes, which cause pigmentation, can be preserved in fossilized specimens.
A similar technique has successfully reconstructed the colours of dinosaurs, but despite well-preserved fur specimens, it has not been widely applied to fossil mammals.
In the new study, Dr. Ruoshuang Li, a colleague of the Chinese University of Earth Sciences and colleague, analyzed melanosomes in 116 living mammals and created a predictive model to reconstruct the hairy colour based on melanosome morphology.
The authors applied the model to six Mesozoic mammalian forms of fossilized melanosomes, including the newly described euhalamyidan species that lived 158.5 million years ago (Late Jurassic Epoch).
The authors found that the fur of these early mammals was primarily and uniformly dark in colour, with no stripes and spots that adorn many modern mammals.
This suggests that despite evolutionary differences in phylogenetics and ecology, the early mammalian melanin colored systems remained little different.
This is in stark contrast to the diverse melanosome structures found in feathered dinosaurs, early birds and pterosaurs, indicating a distinct evolutionary pattern of mammalian colour.
“The typical modern nocturne mammals, such as the dark, uniformly dull fur found in these species – moles, mice, rats and nocturne bats, support the previous hypothesis that early mammals are also largely nocturne and colored for camouflage,” the researchers said.
“In addition, the high melanin content of the fur may have been beneficial in providing mechanical strength for thermoregulation and protection.”
“Following the Cretaceous – Fat extinction event, mammals rapidly diversified into niches previously occupied by dinosaurs, leading to more diverse melanosome structures and new perage colour strategies that are more suited to a more diverse environment.”
Survey results It was published in the journal today Science.
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rushuang li et al. 2025. Mesozoic mammalian forms illuminate the origin of the colour of the hair. Science 387 (6739): 1193-1198; doi: 10.1126/science.ads9734
According to a new study by planetary researchers at Tokyo Planet University, atmospheric gravity waves play an important role in driving airflows, particularly at altitudes, at latitudes.
This image from the Emirates Mars Mission shows Mars and its thin atmosphere. Image credit: UAESA/MBRSC/HOPE MARS MISSION/EXI/ANDREALUCK.
“On Earth, the large atmospheric waves caused by the rotation of a planet known as the Rossby waves are the main effect on the way stratospheric air circulates, or the lower part of the medium atmosphere.”
“However, our research shows that on Mars, gravitational waves have the dominant effect in the mid-atmosphere and at high latitudes.”
“Rossby's waves are large atmospheric or resolved waves, while gravitational waves are unresolved waves, meaning that they must be estimated using finer, more indirect means to be measured or modeled.”
“Don't confuse it with gravitational waves from the body of a large star. Gravitational waves are atmospheric phenomena when packets of air rise and fall due to buoyancy fluctuations. Their oscillating movements cause gravitational waves.”
Due to their small-scale nature and limitations of observational data, planetary researchers previously discovered that it is difficult to quantify their importance in the Martian atmosphere.
Therefore, Professor Sato and her colleagues turned to the Ensemble Mars Atmosphere Reanalysis System (EMARS) dataset generated by various space-based observations over the years to analyze seasonal variation.
“We found something interesting. Gravitational waves promote the rapid vertical movement of angular momentum, which has a major impact on the meridian or north-north in the mid-atmospheric circulation on Mars,” said Anzu Asumi, a graduate student at Tokyo University.
“It's interesting because it's more like the behavior seen in the Earth's mesosphere, not in our stratosphere.”
“This suggests that the effects of these waves may need to be better incorporated to improve existing Mars atmospheric circulation models, and could improve future climate and weather simulations.”
The team is currently planning to investigate the effects of Mars sandstorms on atmospheric circulation.
“So far, our analysis has focused on a year without large sandstorms,” Professor Sato said.
“However, I think these storms could dramatically change the state of the atmosphere and strengthen the role of gravitational waves in circulation.”
“In our research, there is a basis for predicting Mars weather, which is essential to guarantee the success of future Mars missions.”
study It will be displayed in Journal of Journal Geophysics: Planets.
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Anzu Asumi et al. Climatology of the residual average circulation of the Martian atmosphere and the contribution of solutions and unresolved waves based on reanalysis datasets. Journal of Journal Geophysics: PlanetsPublished online on March 6th, 2025. doi:10.1029/2023je008137
The first water molecules could have formed just 100 million to 200 million years after the Big Bang – even the first galaxy kicked off the processes that led to life on Earth.
Shortly after the Big Bang, most of the problems in the universe were hydrogen and helium, with only traces of other lighter elements, such as lithium. Heavy elements like oxygen are not yet present, and water is impossible to form.
These early elements were combined into the first star and produced heavier elements through oxygen-containing fusion. When these stars reach the end of their lives, they explode as supernovae, releasing these heavier elements, allowing oxygen to mix and mix with existing hydrogen to combine H.2O – Water.
Previous research It shows that even the relatively small amount of oxygen produced by the earliest stars could create water molecules, but they say up until now they have not simulated exactly what happens when a protostar becomes a supernova, and how the elements it released blended with the cosmic environment in which the stars were formed. Daniel Warren At the University of Portsmouth, UK. “To do anything less, you just don't know what's going on,” he says.
To investigate this, Whalen and his team used computer models to simulate the birth and death of the first star in a realistic context. These early stars are thought to range from 13 times the massive range of the Sun to 200 times the size of the Sun, so researchers modeled both extremes.
As you can imagine, the larger stars spit out more oxygen and produced more water in the form of steam clouds around the Jupiter mass, while the smaller stars produced Earth's mass, says Whaleen.
Depending on the mass of the star, researchers discovered that water took between 3 million and 90 million years after the supernova explosion. In other words, the first water molecules were formed 100-200 million years after the Big Bang.
Importantly, however, the team discovered that this water was not simply spreading throughout the universe. Instead, gravity caused it, and the other heavy elements produced by the first star were clumped together. That meant these chunks were breeding grounds for the second generation stars, and perhaps the first planet. “It was a huge result,” Whalen says.
“Even before the galaxy took place, this idea of water forming essentially overturning decades of thought about the first emergence of life in the universe,” says Whalen. Team Members Muhammadratif At UAE University, researchers now say they will simulate whether water vapor can survive the destruction of the formation of the first galaxy and harsh radiation.
“We know that the chemistry of life we know requires liquid water and can only be obtained in objects with surfaces in the universe or atmospheric.” avi loeb At Harvard University. It would have been a lot of time before this initial vapor condense into liquid water, but he says it could have helped them to find second-generation stars and their planets using instruments like the James Webbspace Telescope to help them understand this process more, and perhaps these planets could have been habitable millions of years after the Big Bang.
Published in the journal Endocrine review, this research suggests that certain naturally occurring hormones might be able to slow down the aging process in the body.
“Our study sheds light on key hormones that play a role in regulating pathways associated with skin aging, including connective tissue degradation (which leads to wrinkles), stem cell survival, and pigment loss (which causes graying of hair),” explained Professor Markus Böhm from the University of Munster, Germany.
“Some of these hormones have shown anti-aging properties and could potentially be used as treatments to prevent skin aging in the future.”
The primary focus of this research was to examine the connection between hormones and aging, with a particular emphasis on hormones like estrogen, growth hormone, and melatonin, all of which can impact skin aging.
One hormone that stood out in the study was melatonin. While commonly known for its role in regulating sleep, melatonin was found to also play a role in maintaining youthful skin. Its powerful antioxidant effects help protect skin cells and slow the aging process.
Other hormones, such as melanocyte-stimulating hormone and oxytocin, were also identified as potential contributors to maintaining youthful skin and hair and protecting against UV damage.
The skin, being the body’s largest organ, is prone to damage from environmental factors, especially UV rays from the sun.
“The skin not only responds to various hormones that impact skin aging pathways, but it is also a significant site for hormone production, aside from the traditional endocrine glands like the pituitary gland,” added Böhm.
Researchers are hopeful that these findings will lead to the development of a new anti-aging therapy known as Senotherapeutics, which targets and eliminates senescent cells. By doing so, these drugs may help slow down or even reverse the signs of aging that result from the accumulation of these cells in the body over time.
“Further research on these hormones could pave the way for the development of new treatments to address and prevent skin aging,” concluded Böhm.
Use data collected by China’s Zhurong Roverplanetary researchers have identified hidden layers of rocks beneath the Martian surface, which strongly suggests the existence of the ancient North Sea.
Panoramic photograph taken by China’s Zhurong rover on Mars. Image credit: National Astronomer.
“We’re finding locations on Mars that looked like ancient beaches and deltas of ancient rivers,” said Pennsylvania researcher Benjamin Cardenas, who co-authored the study.
“We found evidence of a lack of wind, waves and sand. It’s a proper vacation style beach.”
The now inactive Zhurong Rover landed on Mars in 2021 in an area known as Utopia Planitia and was open for a year between May 2021 and May 2022.
From the time when Mars had a thicker atmosphere and warmer climate, it traveled about 1.9 km (1.2 miles) to cliffs that are considered ancient coastlines from the time period.
Along its path, the rover probed up to 80 m (260 feet) under the surface using ground penetration radar.
This radar is used to detect not only underground objects such as pipes and utilities, but also irregular features.
The radar image shows thick layers of material along the entire path, all facing upwards towards the estimated shoreline at an angle of about 15 degrees, roughly the same as the angle of beach sediments on Earth.
This thickness of sediment on Earth would have taken millions of years to form. It suggests that Mars had long-lived water with the effect of waves to distribute sediments along the sloped coastline.
Radar also allowed to determine the size of the particles in these layers and matched the particles of sand.
However, the deposits do not resemble the ancient wind-blowed dunes common on Mars.
“This quickly stood out to us because it suggested there were waves. That means there was a dynamic interface between air and water,” Dr. Cardenas said. I did.
“Looking back at the places where the earliest life on Earth developed, it was in the interaction between the ocean and the land, which paints an ancient habitable environment, and conditions for microbial life. You can embrace the
“Comparing Mars data with radar images of coastal sediments on Earth, we found impressive similarities.”
“The dip angle observed on Mars fell within the range seen in coastal sedimentary deposits on Earth.”
“We see the coastline of this body of water has evolved over time,” Dr. Cardenas said.
“We tend to think of Mars as a static snapshot of a planet, but it was evolving. The rivers were flowing, the sediments were moving, the land was constructed and eroded. This type of sedimentary geology tells us how landscapes look and how they evolved. And, importantly, identifying where you want to look for your past life. It will help you.”
“The discoveries show that Mars was a much damper location than it used to be today, further supporting the hypothesis of the past oceans that covers most of the planet’s North Pole.”
The study also provides new information on the evolution of Mars’ environment, suggesting that life-friendly warm, wet periods can potentially last tens of millions of years.
“The power of Zhurong Rover allowed us to understand the geological history of the planet in a whole new way,” said the University of California, a professor of Michael Manga at Berkeley.
“That underground intrusion radar gives us an underground view of the planet.
“These incredible advances in technology have made it possible to realize basic science that uncovers a new mountain of information about Mars.”
result It was published in Proceedings of the National Academy of Sciences.
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Jianhui Li et al. 2025. Ancient sea coastal deposits imaged on Mars. pnas 122 (9): E2422213122; doi: 10.1073/pnas.2422213122
Quality of sleep is often judged by the number of hours we sleep, but recent research suggests that the timing of sleep may be more crucial than the duration.
A study published in the journal Sleep indicates that the consistency of your sleep schedule, rather than just the number of hours slept, is a strong predictor of your risk of mortality. Even individuals who consistently get 7-8 hours of sleep but have irregular sleep patterns were found to be at a higher risk of stroke, heart attacks, and cancer. On the other hand, those with a consistent sleep routine had up to a 48% lower risk of death from all causes.
It’s important to note that simply sticking to an erratic sleep pattern with minimal hours of sleep is not advised. The study found that individuals who slept less than six hours or more than nine hours per night had a higher risk of mortality. While sleep duration is significant, the link between mortality and consistent sleep patterns was stronger.
Researchers analyzed data from nearly 61,000 individuals in the UK Biobank, totaling over 10 million recorded sleep hours. By studying sleep patterns and mortality rates, they identified the factors associated with an increased risk of early death.
These findings may lead to updated public health guidelines on sleep recommendations, emphasizing the importance of not only getting sufficient sleep but also maintaining a consistent sleep schedule for overall health improvement.
Further research is needed to determine if these findings are applicable to a broader population beyond the UK.
When it comes to a good night’s sleep, the quality of your sleep may be more important than the number of hours you get. A new study published in the journal sleep suggests that the regularity of your sleep schedule is a strong predictor of your overall risk of death. In fact, research shows that even those who consistently get 7-8 hours of sleep but have irregular sleep schedules are at a higher risk of stroke, heart attacks, and even cancer compared to those with a consistent sleep-wake routine.
Individuals with the most consistent sleep-wake times have been found to have up to a 48% lower risk of all-cause death compared to those with inconsistent routines. However, maintaining a consistent sleep schedule doesn’t mean you can skimp on sleep. Those who slept less than six hours or more than nine hours each night were also at a higher risk of death. Overall, the link between mortality and consistent sleep patterns was found to be stronger than the link between mortality and sleep duration.
Researchers analyzed sleep data from nearly 61,000 people in the UK biobank, totaling over 10 million hours of recorded sleep. Using advanced algorithms, they tracked mortality rates over an average of 6.3 years to identify factors associated with early death. The hope is that these findings will inform updated public health guidelines and sleep recommendations, emphasizing the importance of not only getting enough sleep but also maintaining a consistent sleep schedule for improved overall health.
Further research is needed to determine if these findings apply to populations outside the UK and to a more diverse range of individuals.
In new research, researchers on the planetary Used Global and high -resolution orbital images to discover fresh 21.5 m (71 feet) impact craters that appeared at the same time as one of the Marsquakes detected by NASA's Insight Lander. This means that the seismometer detected a meteor strike, not a geological activity in the planet. In the related research, they scan Through a large number of orbital image data, the 123 shock crater was formed from December 2018 to December 2022.
Calambus et al。 Textonically Active Cerberus Fossae A new 21.5-m MARS Impact Crater is associated with the Insight earthquake event S0794A. Image credit: NASA / JPL-CALTECH / Arizona University.
NASA's Insight Lander set the first seismometer on Mars and detected more than 1,300 Marsquakes. This is generated by the shaking deep of the planet (caused by a rock broken under heat and pressure) and a cosmic rock that collides with the surface.
Scientists not only glimpse the inside of Mars, as science glimpses how the waves of the earthquake change from these earthquakes when passing through the earth's crust, mantle, and core. I understand how all the rocky world, including the month, is formed.
In the past, researchers shot new shock craters images and found seismic data that matched the date and location of the crater layer.
However, two new studies indicate that the shaking and the new effects detected in Cerberus Fossae, which are particularly prone to earthquakes of 1,640 km (1,019 miles) of 1,640 km (1,019 miles) from insights, are the first correlation. Masu.
The diameter of the shock crater is 21.5 m, which is far from the insight than the scientist expected, based on earthquake energy.
Mars crusts have unique characteristics that are considered to suppress seismic waves generated by impact. The new analysis of Cerberusfossae concluded that the generated waves take more direct routes than the planet mantle.
The Insight team needs to re -evaluate the internal configuration and structural models of Mars, and explain how to make the impact -generated earthquake signals so deep.
“We thought that the energy detected from most of the earthquake events was moving through the crust of Mars,” said Dr. Constantinoscharamanbus, a researcher of Imperial College London. Masu.
“This discovery shows a deeper and faster path -it is called an earthquake highway, so that the earthquake can reach the farthest of the earth through the mantle.”
Researchers also wanted to find a crater within the location of about 3,000 km (1,864 miles) and find something that was formed while the Lander seismometer was recorded.
By comparing images before and after the context camera mounted on NASA's Mars Reconnasance Orbiter (MRO), I found 123 fresh craters to interact with INSIGHT data. Of these, 49 was a potential agreement with the earthquake detected by the Lander seismometer.
“I thought that CERBERUS FOSSAE has generated many high -frequency earthquake signals related to internal generated earthquakes, which suggests that some activities are not born there, and actually from the impact. Dr. Charalambous said.
The results of the survey also emphasize how researchers use AI to improve planetary science by using all data collected by NASA and ESA missions.
“Now, we have a lot of images from the moon and Mars, so the struggle is to process and analyze data,” said Dr. Dr., a member of the Bern University researcher. I mentioned it.
“We have finally arrived in the big data era of planetary science.”
VT BICKEL et al。 2025. New impact on Mars: Related to systematic identification and insight earthquake events. Global physics research book 52 (3): E2024GL109133; DOI: 10.1029/2024GL109133
Constantinos Chara Ranboo et al。 2025. New impact on Mars: Unleash CERBERUS FOSSAE's shock detection. Global physics research book 52 (3): E2024GL110159; DOI: 10.1029/2024GL110159
Astronomer using Immersed lattice infrared flash device (IGRINS) Gemini South Telescope devices looked at Wasp-121B, one of the most widely studied Ultra Hot Jupiter.
The artist's illustration indicates Wasp-121B, an alien world that has lost magnesium and iron gas from the atmosphere. Image credit: NASA / ESA / J. OLMSTED, STSCI.
WASP-121B, discovered by astronomers using Wasp-South Survece in 2016, is 1.87 times that of Jupiter, 1.18 times large.
The host star, WASP-121 (TYC 7630-352-1) is an active F6 main sequence star about 1.5 times the size of the sun.
The WASP-121 system is about 881 light-years away to the puppy constellation.
WASP-121B is a so-called “hot jupiter” and takes only 1 for three days to get on WASP-121 on track. As it is very close to the parent's star, as it approaches, the gravity of the star begins to tear.
Astronomers estimate that the temperature of the planet is about 2,500 degrees (Hana 4,600 degrees), which is enough to boil some metals.
The new Iglin observation results have revealed something unexpected about the WASP-121B formation history.
With these observations, Peter Smith and his colleagues at the Arizona State University, for the first time, measured the ratio of passenger rocks and ice using a single instrument.
“Gemini South using IGRINS has actually measured individual chemical existence more accurately than even achieving a space -based telescope,” said Smith.
The spectroscopic data indicates that the WASP-121B has a high ratio of rock and ice, and indicates that excessive rocky materials have been accumulated during the formation.
This suggests a planet formed in the area of the protranetary disk that is too hot for the ice to condense.
“Our measurement means that this typical view must be reconsidered and the planetary formation model needs to be revisited,” Smith said.
Astronomers also discovered a remarkable feature of the WASP-121B atmosphere.
“The climate of this planet is extreme, not the earth's climate,” Smith said.
Since the planet daySide is very hot, elements that are generally considered “metal” evaporate in the atmosphere and can be detected by the spectroscopic method.
The strong wind blows these metals into the permanent night side of the planet. There, it is cool enough to condense and rain. This is an effect observed on Wasp-121B in the form of calcium rain.
“The sensitivity of our device can be used to examine the subtle wind speed by examining various areas, altitude, and long terms using these elements, revealing how dynamic this planet is. You can do it, “said Smith.
Peter CB Smith et al。 2025. Roasted marshmallow program with Gemini South Igulin. II. WASP-121 B has a ratio of superstar C/O and impact resistance and volatility. AJ 168, 293; DOI: 10.3847/1538-3881/AD8574
Near-Earth asteroid 2024 PT5 is in an Earth-like orbit and remained very close to Earth for several months at the end of 2024.
2024 PT5 captured a brief flyby from September 29 to November 25, 2024. Image credit: University of Colorado.
2024 PT was first detected on August 7, 2024 by the NASA-funded Asteroid Terrestrial Last Alert System (ATLAS) telescope at the University of Hawaii in Sutherland, South Africa.
This asteroid poses no danger to Earth, but its orbit around the sun closely matches that of our planet.
The object, which is about 10 meters (33 feet) wide, appears to be composed of rock that broke off from the moon’s surface and was ejected into space after a major impact.
“There was a general idea that this asteroid might have come from the moon, but when we discovered that this asteroid is rich in silicate minerals, it became conclusive proof. The silicate minerals are not the kind found on asteroids, but rather the ones found in the moon’s rocks. Dr. Teddy Kaleta Astronomer at Lowell Observatory.
“It doesn’t seem to have been in space very long, perhaps only a few thousand years, because there was no cosmic weathering to cause its spectrum to turn red.”
Using observations from the Lowell Discovery Telescope and NASA’s Infrared Telescope Facility (IRTF) at Mauna Kea Observatory in Hawaii, Dr. Kaleta and his colleagues show that the spectrum of sunlight reflected from the surface of 2024 PT does not match its spectrum. showed. A known asteroid type. Instead, the reflected light more closely matched the moon’s rocks.
This discovery doubles the number of known asteroids thought to originate from the Moon.
“Asteroid 469219 Kamooarewa was discovered in 2016 in an Earth-like orbit around the sun, indicating that this asteroid may also have been ejected from the lunar surface after a major impact,” the astronomers said. said.
“As telescopes become more sensitive to smaller asteroids, more potential lunar boulders will be discovered, and scientists studying the moon as well as scientists studying rare asteroid populations will It creates exciting opportunities for everyone.”
“If a lunar asteroid could be directly related to a specific impact crater on the Moon, studying it could provide insight into the cratering process on the pockmarked lunar surface.”
“Also, material collected from deep on the moon’s surface in the form of asteroids passing close to Earth could be available to future scientists for study.”
“This is a story about the moon told by asteroid scientists,” Dr. Kaleta said.
“It’s an unusual situation where we go out to study asteroids and end up wandering into new territory in terms of the questions we can ask for PT5 in 2024.”
of findings On January 14, 2025, Astrophysics Journal Letter.
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Theodore Caleta others. 2025. On the origin of the near-Earth asteroid moon2024 PT5. APJL 979, L8; doi: 10.3847/2041-8213/ad9ea8
A massive flood called the Zanclean Flood ended the Messinian salinity crisis that lasted from 5.97 million to 5.33 million years ago, according to a new study led by the Monterey Bay Aquarium Research Institute (MBARI).
One of the scenarios being discussed for ending the Messinian Salinity Crisis 5.33 million years ago is the catastrophic backfilling of the Mediterranean Sea by the Zanclean Flood. Micallef others. They present clear onshore and offshore evidence that this deluge spilled over a shallow marine corridor in southeastern Sicily into the nearby underwater Noto Gorge. This aerial photo shows a ridge eroded by a major flood, located northeast of Masseria del Volpe, in southeastern Sicily. Image credit: Kevin Sciberras and Neil Petroni.
“The Zanclean Flood is an awe-inspiring natural phenomenon, with flows and velocities that seem dwarfed by any other known flood in Earth’s history,” said the study’s lead author, C.A. said Dr. Aaron Micallef, a research scientist at the Monterey Bay Aquarium Research Institute.
“Our study provides the most convincing evidence yet of this unusual event.”
During the Messinian salinity crisis, the Mediterranean Sea was isolated from the Atlantic Ocean and evaporated, creating vast salt deposits that transformed the region’s landscape.
Scientists have long believed that this dry period would gradually end and that the Mediterranean Sea would be reclaimed over 10,000 years.
However, the discovery in 2009 of an eroded channel stretching from the Gulf of Cadiz to the Alboran Sea called this idea into question.
The discovery points to a single major flooding event lasting between two and 16 years, which became known as the Zanclean Flood.
Estimates indicate that the outflow of this megaflood was between 68 and 100 Sverdraps (Sv), where 1 sievert is equivalent to 1 million cubic meters per second.
In their research, Dr. Micallef and his colleagues combined newly discovered geological features with geophysical data and numerical modeling to provide the most comprehensive picture of the megaflood to date. did.
The researchers investigated more than 300 asymmetric streamlined ridges in the corridor across the Sicilian Sil, a submerged land bridge that once separated the western and eastern Mediterranean basins.
“The morphology of these ridges corresponds to erosion by large-scale turbulence, mainly in a north-easterly direction,” said Professor Paul Carling from the University of Southampton.
“They reveal the immense power of the Zanclean Flood and how it changed the landscape and left a lasting mark on the geological record.”
Scientists sampled the ridge and found that it was overlain by a layer of rock debris containing material eroded from the sides of the ridge and surrounding areas. This indicates that it was deposited there rapidly and with great force.
This layer lies right on the boundary between the Messinian and Zanclean periods, where the Great Flood is thought to have occurred.
Using seismic reflection data, a type of geological ultrasound that allows scientists to see layers of rock and sediment beneath the Earth’s surface, the authors found a “W-shaped” shape on the continental shelf east of Sicily’s Sill. discovered a waterway.
This channel, dug into the ocean floor, connects the ridge to the Noto Gorge, a deep underwater canyon located in the eastern Mediterranean.
The shape and location of the channel suggest that it functioned like a giant funnel.
When the mega-flood flowed into Sicily’s Sill, this channel is thought to have carried the water towards the Noto Valley and into the eastern Mediterranean.
The research team developed a computer model of the flood to simulate how the water behaved.
The model shows that floodwaters change direction and increase their strength over time, reaching speeds of up to 32 meters per second (72 miles per hour), carving deeper channels, eroding more material, and increasing their length. This suggests that they may have been transported over long distances.
“These discoveries not only reveal a critical moment in Earth’s geological history, but also prove that landforms persist for five million years,” Dr. Micallef said.
“This opens the door to further research on the Mediterranean coast.”
of study Published in a magazine Communication Earth and Environment.
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A. Micallef others. 2024. Land-to-sea indicators of the Zanclean Flood. common global environment 5,794;doi: 10.1038/s43247-024-01972-w
homo erectusan early member of the genus homoA new study shows that a new study shows that the astronauts were able to successfully navigate longer, harsher and drier terrain in eastern Africa than previously thought.
archaic humans. Image credit: Ninara / CC BY 2.0.
For a long time, debate has centered on when this genus originated. homo They have acquired the adaptability to survive even in extreme environments such as deserts and tropical rainforests.
Traditionally, homo sapiens Archaic humans were thought to be able to sustainably occupy such ecosystems, and ancient hominids were thought to be confined to smaller ranges.
However, evidence suggests that at an early stage homo Two million years ago, they had the ability to adapt to diverse and unstable environments.
“It’s extinct now, but homo erectus Professor Michael Petraglia of Griffith University said: “Humans have existed for an estimated 1.5 million years or more, marking the successful survival of the species in our evolutionary history.” Compared to that, it is about 300,000 years until now.
Professor Julio Mercader of the University of Calgary added, “Their success is due to their ability to survive over long periods of time characterized by many changes in environment and climate.”
Investigate how climate change has affected ecological ranges, dispersal patterns, and technology. homo erectusThe authors conducted an interdisciplinary study at Engazi Nayori in Oldupai Gorge, an important early human settlement on the equator in Tanzania.
They discovered that between about 1.2 million and 1 million years ago, the region remained semi-desert, with distinctive plant life.
Archaeological data suggests the existence of the following groups: homo erectus They repeatedly settled in areas where fresh water was available, such as ponds, and adapted to local conditions by developing specialized stone tools such as scrapers and jagged tools (known as denticles).
The researchers suggest that, taken together, these findings demonstrate that: homo erectus Their ability to survive in extreme environments was far greater than previously thought.
“This adaptive profile, characterized by resilience in arid regions, challenges assumptions about the dispersal limits and location of early humans.” homo erectus As a versatile generalist and the first human to transcend environmental boundaries on a global scale,” Professor Petraglia said.
“This adaptability is probably due to homo erectus They invaded the arid regions of Africa and Eurasia and redefined their role as ecological generalists, thriving in some of the most difficult landscapes of the Middle Pleistocene,” added Professor Paul Durkin of the University of Manitoba. .
of findings Posted in today's diary Nature Communication Earth and Environment.
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J. Mercader others. 2025. homo erectus One million years ago, they adapted to the extreme climates of grasslands and deserts. common global environment 6, 1; doi: 10.1038/s43247-024-01919-1
New research suggests the moon may be older than many scientists thought.
This study suggests that the moon rock samples taken during the Apollo missions date back to an event in which the moon's surface melted, rather than the moment the moon formed.
Therefore, the authors believe that the Moon formed about 4.51 billion years ago, which is more than 100 million years earlier than the generally accepted estimate.
The moon may be more than 100 million years older than some scientists previously thought, according to a new study.
The study was published on Wednesday. journal naturechallenges long-held ideasThe moon is thought to have formed about 4.35 billion years ago after an object the size of Mars crashed into the early Earth and created our natural satellite.
That timeline is based on analysis of lunar rock samples taken during NASA's Apollo mission. But new research shows that the moon formed much earlier, about 4.51 billion years ago, and then underwent a dramatic “remelting” phenomenon around the time other scientists thought the moon first formed. It suggests that you have experienced it.
According to the authors, the melting occurred because Earth's constant gravitational pull distorted the moon and made it extremely hot as it moved away from Earth. According to the study, this process altered the moon's surface and hid the moon's true age.
The study's lead author, Francis Nimmo, a professor in the Department of Earth and Planetary Sciences at the University of California, Santa Cruz, said the extreme heating caused the moon's surface to re-melt, effectively “resetting all the clocks” on the moon's rocks. 'There is a possibility.
“So moon rocks don't tell us when the moon formed, but they tell us when subsequent events that heated the moon occurred,” he says.
The scientific community has disagreed for decades about the exact age of the moon. Nimmo and his colleagues are not the first to offer older estimates. This new discovery adds to the growing consensus that there may be more to the moon's history than the Apollo samples revealed.
For example, planetary scientists have wondered how a massive collision occurred 4.35 billion years ago, when most large objects in the history of the solar system were thought to have already come together to form planets. I have had a hard time explaining why the moon was formed.
“Those who studied the Apollo samples had reasonable guesses about the moon's age, but those who modeled how the planets in our solar system formed are wondering why so much material still remains after 200 million years. “It was always difficult to explain why the solar system was still flying,” Nimmo said. “That's the way it is, and the two camps want different ages.”
The adjusted schedule by Nimmo's team may also help explain why.A mineral called zircon found on the moonIt was discovered in Apollo's moon rock and is estimated to be approximately 4.5 billion years old. The moon's zircons, like other minerals on the moon, were thought to have crystallized during the moon's extreme temperatures, but their much older age has long puzzled scientists. .
In a new study, Nimmo and his colleagues suggest that the moon's overheating is the product of a process known as “tidal heating.”
“There are certain spots where the moon's orbit can be temporarily thrown off as it gets pushed aside,” Nimmo said. “During that time, the moon can be squeezed and stretched by Earth's gravity, which causes it to heat up.”
Similar tidal heating is thought to occur between Jupiter and its moons. a 2020 survey Researchers have discovered that the gas giant's gravity can stretch and squeeze some of its icy moons to the point where they heat up their interiors and melt rocks into magma. It is believed that this also applies to Jupiter's moon Io.
Recent and upcoming lunar missions could provide better insight into the moon's evolutionary history, Nimmo said. This includes China's Chang'e 6 mission, which collected samples from…
“The evolution of the solar system was very rapid. In just tens of millions of years, all the objects we know today were formed,” Munker said. “That's why we need very good temporal resolution for these very early events and why it's important to understand how the Earth-Moon system formed.”
It’s that time of the year again when runny nose season has already arrived. However, for some people, runny noses are a year-round struggle due to allergies. In fact, an estimated 25-40% of people worldwide are affected by allergic rhinitis, a condition that causes inflammation of the nose’s mucous membranes.
So, what’s behind this constant sniffing? Scientists may have an answer: individuals with allergies harbor a variety of fungi in their noses.
Despite this discovery, the presence of any fungus in our noses is quickly countered by our immune system. We all have fungi in our nasal mycobiome, a diverse community of fungal microorganisms that reside in our nostrils and sinuses, contributing to our overall microbial diversity essential for maintaining a healthy immune system and fighting off harmful pathogens.
In a study on nasal mycobiome, researchers collected nasal swabs from 214 allergic patients and 125 healthy individuals. The swabs showed significant differences in the prevalence and diversity of nasal fungi between the two groups, with allergic patients exhibiting more abundant and diverse mycobiomes.
“These findings suggest that the nasal cavity serves as a reservoir for fungi that may contribute to allergic rhinitis,” said Dr. Luis Delgado, a Professor at the University of Porto, Portugal, and one of the authors of a new study published in 2006 in the journal Frontiers of Microbiology.
The study also identified specific metabolic pathways more common in the fungal communities of allergic rhinitis patients, potentially paving the way for future allergy treatments.
Saturn’s icy rings may be much older than they appear, as they are resistant to contamination from collisions with rocky debris.
Hyodo others. This suggests that the apparent youthfulness of Saturn’s rings may be due to resistance to pollution, rather than an indication that they were formed at a young age. Image credits: NASA / ESA / Hubble / A. Simon, NASA Goddard Space Flight Center / MH Wong, University of California, Berkeley / OPAL team.
Saturn’s rings were once thought to be ancient, perhaps forming at the same time as Saturn itself, about 4.5 billion years ago.
Over time, it is thought that the rock and ice particles that make up the ring become dirty and darkened by micrometeorite impacts.
However, when NASA’s Cassini spacecraft reached Saturn in 2004, it observed that Saturn’s rings appeared relatively bright and clean.
“According to the hypothesis that non-icy micrometeorite impacts act to darken Saturn’s rings over time, Saturn’s rings are estimated to be approximately 100 million to 400 million years old. “Cassini observations show that the particles in the rings appear to be relatively clean,” said Dr. Tatsuki Hyodo of Tokyo University of Science and colleagues.
“These younger age estimates assume that the rings formed from pure water ice particles with high accretion efficiency impacting non-ice micrometeorite material.”
In the new study, researchers used a computer model to simulate the collision between a micrometeorite and an ice ring particle.
They found that high-velocity collisions can cause the micrometeorite to evaporate, and that vapor can expand, cool, and condense in Saturn’s magnetic field to form charged nanoparticles and ions.
The researchers’ simulations showed that these charged particles could either collide with Saturn, be dragged into the atmosphere, or escape Saturn’s gravity altogether.
As a result, scientists suggest that little of this material builds up on the rings, keeping them relatively clean.
They say very low pollution levels mean Saturn’s rings are actually billions of years old and are simply maintaining a more youthful appearance. suggests that it is possible.
Although more research is needed, this process may also occur in the rings of Uranus and Neptune, as well as in the icy moons around the giant planets.
“High-velocity collisions leading to the production of charged nanoparticles and ions could potentially occur in places such as the rings of Uranus and Neptune or the icy moons around the giant planets,” the authors said.
“While this mechanism may not change the bulk composition of the impacted target, it suggests that the surface composition may change.”
“Furthermore, the new material from the impactor may not be efficiently incorporated into the satellite’s rings or surface and may be transported elsewhere.”
“Thus, most of the compositional differences observed in the various ring systems of giant planets may be due to their formation processes, for example when building materials come from outside the system, rather than to their post-formation dynamics.” There is a sex.”
of study Published in this week’s magazine natural earth science.
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Takashi Hyodo others. Pollution resistance of Saturn’s ring particles during micrometeoroid impact. nut. earth sciencepublished online on December 16, 2024. doi: 10.1038/s41561-024-01598-9
Paleontologists have discovered a new species of early gorgonopsian therapsid that was part of the ancient summer humid biome of equatorial Pangea.
Recreating the life of the Gorgonopsians of Mallorca in a floodplain environment. Image credit: Henry Sutherland Sharpe.
Therapsids were a major component of Permian terrestrial ecosystems around the world, eventually giving rise to mammals in the early Mesozoic Era.
However, little is currently known about when and where it originated.
“Therapsids are a diverse and ecologically successful clade of tetrapods, of which the modern representatives are mammals,” says paleontologist at the Museum of Science and Nature in Barea and the Paleontological Institute of Catalonia. said Dr. Rafel Matamares and colleagues.
“The roots of this clade date back to the late Paleozoic era, when non-mammalian therapsids were important components of terrestrial ecosystems.”
“The oldest distinct therapsids known to date were Laranimus dashankoensisprobably from the Rhodian (Late Middle Permian) deposits of Central East Asia.
“However, phylogenetic analyzes consistently show that therapsids are a sister group to the pterosaur ‘perisaurian’ class monoapsids, which originated in Pennsylvania (about 320 million years ago). It suggests that
“This implies a long lineage of therapsid ghosts spanning about 40 million years.”
The newly discovered therapsid is the oldest of its kind, and possibly the oldest therapsid ever discovered.
This dog-like saber-toothed animal does not yet have a species name, but it belongs to a group of therapsids called gorgonopsids.
“Gorgonopsids are more closely related to mammals than to other modern animals,” said Dr. Ken Angielczyk, a paleontologist at the Field Museum.
“They have no modern descendants and are not our direct ancestors, but they are related to species that were our direct ancestors.”
“The oldest known gorgonopsids lived about 265 million years ago, but the newer fossils date from 270 to 280 million years ago.”
“This is probably the oldest chrysophyte on Earth,” said Dr. Josep Fortuny, a paleontologist at the Miquel Crusafont Catalan Institute of Paleontology.
This fossil was discovered on the Spanish island of Mallorca in the Mediterranean Sea. However, during the time of the Gorgonopsians, Mallorca was part of the supercontinent Pangea.
“The amount of bone remains is surprising,” Dr. Matamares said.
“We found everything from fragments of skulls, vertebrae and ribs to a very well-preserved femur.”
“In fact, when we started this excavation, we did not expect to find so many fossils of this type of animal in Mallorca.”
“If you saw this animal walking down the street, you would think it would look a little like a medium-sized dog, maybe about the size of a husky, but that’s not entirely true,” says Dr. Angielczyk.
“It didn’t have any fur, and it probably didn’t have dog ears.”
“But this is the oldest animal with long, blade-like canine teeth that scientists have ever discovered.”
“These saber-like teeth suggest that this gorgonopsid was the top predator of its time.”
The fact that this gorgonopsian is tens of millions of years older than its closest relatives has changed scientists’ understanding of the evolutionary time of therapsids, key milestones to the emergence of mammals, and, by extension, where we came from. It tells us something about Tanoka.
“Before the age of dinosaurs, there was the age of our ancient mammalian relatives,” Dr. Angielczyk said.
“Most of those ancient mammal relatives looked nothing like what we think of as mammals today.”
“But they were really diverse and had different ecological roles.”
“This new fossil discovery is another piece of the puzzle of how mammals evolved.”
This finding is reported in the following article: paper Published in a magazine nature communications.
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R. Matamares-Andrew others. 2024. Early-Middle Permian Mediterranean gorgonopsids suggest an equatorial origin for therapsids. Nat Commune 15, 10346; doi: 10.1038/s41467-024-54425-5
Planetary researcher Tereza Konstantinou and colleagues at the University of Cambridge examined the chemical composition of Venus’s atmosphere and found that the planet’s interior today is too dry to support oceans on its surface. I reasoned that it wasn’t. Rather, Venus is thought to have been a scorching and harsh world throughout its history.
This composite image taken by JAXA’s Akatsuki spacecraft shows Venus. Image credit: JAXA / ISAS / DARTS / Damia Bouic.
From a distance, Venus and Earth look like siblings. It is a rocky planet, about the same size as Earth.
But up close, Venus is more like its evil twin. Venus is covered in thick clouds of sulfuric acid, and its surface has an average temperature of nearly 500 degrees Celsius.
Despite these extreme conditions, astronomers have wondered for decades whether Venus once had a liquid ocean capable of supporting life, or whether some mysterious form is now hidden within its thick clouds. I have been investigating whether there are “airborne” life forms.
“Until we send a probe at the end of this decade, we won’t know if Venus could support life, or if it actually could support life,” Constantineau said.
“However, given that Venus likely did not have an ocean, it is unlikely that Venus could have supported Earth-like life that required liquid water.”
When looking for life elsewhere in the galaxy, astronomers focus on planets orbiting their host stars within the habitable zone. There, temperatures are such that liquid water can exist on the planet’s surface.
Venus provides strong constraints on where this habitable zone exists around the star.
“Despite being our closest planet, Venus is important for exoplanet science because it allows us to explore planets at the edge of the habitable zone that have evolved quite differently than us. Because it gives us a unique opportunity,” Constantinou said.
A dichotomous climate pathway for Venus is proposed. Image credit: Konstantinou others., doi: 10.1038/s41550-024-02414-5.
There are two main theories about how conditions on Venus have evolved since its formation 4.6 billion years ago.
First, surface conditions on Venus were once warm enough for liquid water to exist, but a runaway greenhouse effect caused by widespread volcanic activity has caused Venus to become increasingly hot. is.
The second theory is that Venus was born at such a high temperature that liquid water could not condense on its surface.
“Both of these theories are based on climate models, but we wanted to take a different approach based on observations of Venus’s current atmospheric chemistry,” Constantinou said.
“To keep Venus’s atmosphere stable, the chemicals that are removed from the atmosphere must also be replaced, because the interior and exterior of Venus are constantly in chemical communication with each other.”
The researchers calculated the current rate of destruction of water, carbon dioxide, and carbonyl sulfide molecules in Venus’s atmosphere, which must be repaired by volcanic gases to keep the atmosphere stable.
Volcanic activity provides a window into the interiors of rocky planets like Venus through the supply of gases into the atmosphere.
As magma rises from the mantle to the surface, it releases gases from deep within the planet.
Since the Earth’s interior is rich in water, volcanic eruptions on Earth produce mostly water vapor.
However, based on the composition of the volcanic gases needed to maintain Venus’s atmosphere, scientists have found that Venus’s volcanic gases are at most 6% water.
These dry eruptions suggest that Venus’s interior, the source of the magma that releases volcanic gases, is also dry.
By the end of this decade, NASA’s DAVINCI mission will be able to test and confirm whether Venus has always been an arid and inhospitable planet by sending a series of flybys and probes to the surface. Dew.
The results could help astronomers narrow their search for planets capable of supporting life in orbits around other stars in the galaxy.
“If Venus was habitable in the past, that means other planets we have already discovered may also be habitable,” Constantineau says.
“Instruments like NASA/ESA/CSA’s James Webb Space Telescope are ideal for studying the atmospheres of planets close to their host stars, like Venus.”
“But if Venus was never habitable, Venus-like planets elsewhere are less likely to have habitable conditions or candidates for life.
“We wanted to know that Venus was once a planet much closer to ours, so it’s sad in a way to find out that it wasn’t, but in the end it turned out that most of it was a planet closer to Earth. It would be more profitable to focus our exploration on planets that could probably support life, at least life as we know it. ”
of study Published in this month’s magazine natural astronomy.
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T. Constantinou others. The arid interior of Venus, constrained by atmospheric chemistry. Nat Astronpublished online on December 2, 2024. doi: 10.1038/s41550-024-02414-5
This article is based on a press release provided by the University of Cambridge.
Influencers are big fans of post-workout ice baths.
But a recent small study suggests that recreational athletes may perform better when using hot tubs instead of cold ones, especially during breaks in training like halftime in football or soccer games. The study was presented at the Integrative Exercise Physiology Conference at the University Park, Pennsylvania.
According to Mamoru Tsuyuki, the lead author of the study and a master’s student in sports and health science at Ritsumeikan University, hot water promotes blood flow, helps muscles repair, and increases power output. He recommends soaking in hot water for 15-20 minutes to improve performance in the second half of a workout. Despite the benefits of hot water, Tsuyuki acknowledges that cold water can still be beneficial for relieving muscle pain and treating injuries.
Further research is needed to compare the advantages and disadvantages of both hot and cold water treatments. Different types of exercises may yield different results with each temperature soak.
Why Hot Soaks are Beneficial
To explore the effects of hot and cold water in more detail, Tsuyuki and his team conducted a three-part study involving 10 young men. After high-intensity interval running, the men soaked in either a 104-degree or 59-degree bathtub for 20 minutes or sat in water without soaking.
The study results showed that jumping heights were higher after hot water immersion compared to cold water immersion. Muscle soreness was not significantly different between the two groups.
Although cold baths can be soothing for injuries involving heat and inflammation, they may have a negative impact on post-workout recovery for intense workouts, according to Amy Leighton, an associate professor of applied physiology at Columbia University. Hot water facilitates circulation and speeds up the recovery process after strenuous exercise.
Dr. Spencer Stein, an orthopedic and sports medicine specialist at New York University, acknowledges the benefits of cold water baths in reducing pain but notes that warm baths are preferred by professional teams before a game. David Putrino, a rehabilitation innovation director, advises athletes to experiment with different temperatures and observe how their bodies react to determine the most effective recovery strategy.
Putrino recommends soaking in hot water for 10-20 minutes at 98-104 degrees Fahrenheit and in ice water for 10-15 minutes at 50-59 degrees Fahrenheit. Start with a 5-minute soak if you are new to cold water treatment. Ultimately, the best temperature soak is the one that helps you recover the fastest, so individual experimentation is key.
Air pollution is difficult to avoid, especially for city dwellers
Ron Adder/Alamy
Air pollution is increasingly linked to an increased risk of eczema, with new research showing a clear link between air pollution and skin conditions.
Vehicles and power plants emit pollution particles smaller than 2.5 micrometers in diameter, called PM2.5. These have previously been associated with an increased risk of eczemathis is thought to be the result of the immune system becoming overactive and causing inflammation, drying out the skin and causing itching.
In order to collect more evidence, Jeffrey Cohen Professors at Yale University School of Medicine analyzed the medical records of more than 280,000 people. Most of them were in their 50s and participated in this medical treatment. Research programs for all of us. It collects health data from a diverse population in the United States, with an emphasis on people typically underrepresented in research, such as ethnic minorities.
We then compared PM2.5 levels at 788 locations across the United States to eczema cases diagnosed through mid-2022. They found that for every 10 micrograms per cubic meter of PM2.5, the incidence of eczema more than doubled. “More contaminated areas of the country had more eczema outbreaks,” Cohen says.
The research team considered factors that could influence the results, such as ethnicity and whether the participants smoked or had food allergies.
“This study successfully demonstrated a clear correlation in a large population and advanced the science,” he says. Giuseppe Varacchi at North Carolina State University. PM2.5, like pollen and dust mites, can irritate the immune system and cause inflammation when it comes into contact with the skin, Valacki said. Inhaling it may also have an effect, he says, because it can worsen inflammation in the body.
The study should give governments new reasons to implement policies to reduce air pollution, Cohen said. Meanwhile, people living in contaminated areas can reduce their risk by wearing long sleeves and staying indoors when pollution levels are particularly high, Valacki said.
When NASA's Voyager 2 spacecraft flew by Uranus in 1986, scientists got their first close glimpse of the giant icy planet. Alongside the discovery of new moons and rings, a puzzling new mystery faced scientists. The energetic particles around Uranus defied their understanding of how magnetic fields trap particle radiation. The cause of that special mystery is a cosmic coincidence, according to a new study. Just before Voyager 2's flyby, Uranus was found to have been affected by an unusual type of space weather that crushed and dramatically compressed the planet's magnetic field. Its magnetosphere.
The first panel of this artist's concept depicts how Uranus' magnetosphere operated before NASA's Voyager 2 flyby. The second panel shows that an unusual type of solar weather occurred during the 1986 flyby, giving scientists a biased view of the magnetosphere. Image credit: NASA/JPL-Caltech.
The planetary magnetosphere (the region around a planet dominated by its magnetic field) influences the environment around the planet, and understanding its properties is important for mission planning.
Voyager 2's close encounter of Uranus reveals a unique magnetosphere that is highly asymmetric and appears to lack plasma, a common element in the magnetospheres of other planets, and has an unusually strong band of high-energy electrons It became.
The signatures from this single measurement have since been used as the basis for understanding Uranus's magnetic field, but these anomalies have been difficult to explain without complex physics.
“If Voyager 2 had arrived just a few days earlier, we would have seen a completely different magnetosphere on Uranus,” said Dr. Jamie Jasinski, a researcher at NASA's Jet Propulsion Laboratory.
“The spacecraft observed Uranus in a situation that has a probability of only about 4%.”
Jasinski and his colleagues reanalyzed Voyager 2 data before the flyby and found that the spacecraft encountered Uranus shortly after a violent solar wind event that ejected streams of charged particles from the Sun's atmosphere.
This compressed Uranus's magnetosphere, creating a condition that only occurs 4% of the time.
In this state, we see a plasma-free magnetosphere with highly excited electron emission bands.
The authors suggest that two magnetospheric cycles may exist during solar minimum due to variations in Uranus' solar wind.
Additionally, the chances of Uranus' outermost major moons, Titania and Oberon, orbiting outside the magnetosphere may be very low, giving scientists the possibility of detecting an underground ocean without interference from the magnetosphere. There is.
“The 1986 flyby was full of surprises, and we were looking for an explanation for its unusual behavior,” said Dr. Linda Spilker, also of NASA's Jet Propulsion Laboratory.
“The magnetosphere measured by Voyager 2 is just a snapshot in time.”
“This new study explains some of the apparent contradictions and will once again change our view of Uranus.”
of findings Published in today's magazine natural astronomy.
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JM Jasinski others. Unusual conditions in Uranus' magnetosphere during Voyager 2's flyby. Nat Astronpublished online on November 11, 2024. doi: 10.1038/s41550-024-02389-3
New DNA analysis has shed light on the victims of the Pompeii disaster, challenging previous assumptions.
Researchers from the United States and Italy conducted a recent study that uncovered remains believed to be of family members, suggesting that the gender of some individuals may have been misidentified. Source
The study’s scientists argue that gender roles may have influenced the misconceptions about the victims of Pompeii.
“This study highlights the unreliability of narratives based on limited evidence, often reflecting the biases of researchers at the time,” explained Dr. David Carameli, co-author of the study and researcher at the University of Florence.
When Mount Vesuvius erupted in 79 AD, over 2,000 people perished, and Pompeii was buried under 3 meters of volcanic material. The city was preserved until its rediscovery in 1599.
Using plaster casts created by archaeologist Giuseppe Fiorelli in the 19th century, researchers could analyze bone fragments mixed with plaster to extract DNA information about the victims’ gender, genetic relationships, and ancestry.
It is believed that, in the absence of DNA evidence, past researchers made assumptions based purely on the physical appearance of the casts.
For instance, a family discovered in the House of the Golden Bracelet in Pompeii was re-examined. Initial assumptions about their relationships were proven wrong through DNA evidence.
Notably, experts previously misidentified a pair as sisters or mother and daughter, while genetic testing revealed one of them to be male.
The study, which examined 14 victims and was reported in the journal current biology, hopes to improve the understanding of archaeological data and ancient societies in Pompeii and beyond.
China has introduced solar power generation, and panels have been installed on North Barren Mountain in Zhangjiakou City.
Cost Photo/NurPhoto/Getty Images
With large-scale deployment of wind and solar power across China, the country's emissions could peak in 2023, potentially marking a historic turning point in the fight against climate change. be.
China's CO2 emissions hit a record high in 2023 as the Chinese economy recovers from the effects of the coronavirus pandemic. But since then, large amounts of wind and solar power have been added to the country's power grid, while emissions from the construction industry have declined.
China's carbon dioxide emissions remained flat from July to September 2024, after falling by 1% in the second quarter of this year, according to a new analysis. This means that overall emissions in 2024 could be flat or slightly down at 2023 levels.
This will be critical to tackling global climate change. Lauri Milivirta At the Center for Energy and Clean Air Research, a Finnish think tank. “For the past eight years, since the signing of the Paris Climate Agreement, China's emissions growth has been the main driver of global emissions,” he says.
In its climate change plan submitted to the United Nations, China pledged to peak greenhouse gas emissions by 2030 and achieve net-zero emissions by 2060. But experts warn. This plan is not very ambitious Given the large impact that China, the world's largest emitter, has on global climate change.
It's important for China to bring emissions to a peak as soon as possible, Millibilta said. “This would pave the way for the country to start reducing emissions much sooner than current commitments require,” he said. “This will have huge implications for global efforts to avoid catastrophic climate change.”
China is rushing to ramp up power supplies across the country to meet rapidly growing power demand. This demand increased by 7.2% year-on-year from July to September, due to rising living standards and increased demand for air conditioning due to the strong heat wave from August to September.
New renewable energy sources are being introduced at breakneck speed across China to fill the electricity demand gap. From July to September, compared to the same period in 2023, solar power generation increased by 44 percent and wind power generation increased by a whopping 24 percent. Based on the current trajectory, China's solar power growth this year will rival China's total annual electricity generation. Australia in 2023.
However, coal-fired power usage still increased by 2% and gas production increased by 13% from July to September in response to increased demand. This resulted in an overall 3% increase in CO2 emissions from China's power sector during this period. However, these were offset by a slowdown in the construction industry across China as real estate investment declined.
Oil demand also fell by 2% in the third quarter of this year, as electric vehicles continue to make up a larger share of China's car fleet. By 2030, almost one in three cars on China's roads will be expected to be electric.
Myllyvirta carried out an analysis of the website carbon briefs Uses official figures and commercial data. “If the rapid growth of clean energy is sustained, it will pave the way for sustainable emissions reductions,” he says.
However, he said that flat or declining emissions in 2024 were not guaranteed as government stimulus measures to boost the economy could cause emissions to rise in the last three months of the year. He warns that this does not mean that the Carbon emissions must fall by at least 2% in the last three months. He predicted that three months of this year will be below 2023 levels.
still Signals from the Chinese government It has signaled that the country's emissions are expected to continue rising until the end of the decade, which would use up the remaining global carbon budget by 1.5 degrees Celsius.
Weighted blankets can help improve sleep in adults with insomnia and mental health conditions such as anxiety and depression, but results are mixed in children, one researcher says. new review paper Published in American Occupational Therapy Journal.
dawson others. We suggest that occupational therapists should consider offering or recommending weighted blankets as a sleep intervention option for all age groups, taking into account individual preferences. Image credit: Martin de Arriba.
“Sleep is a basic human need, and not getting enough sleep can increase or worsen the risk of chronic diseases such as heart disease, stroke, and mental health problems, as well as It can cause health problems.” Dr Suzanne Dawson, researcher at Flinders University.
“In occupational therapy, weighted blankets are becoming common among many age groups as an assistive technology, but there are no current clinical guidelines for their use.”
In a review study, Dr. Dawson and fellow authors considered 18 existing studies that investigated the overnight use of weighted blankets.
They found significant evidence supporting the use of weighted blankets to improve sleep in adults.
“Weighted blankets appear to offer a specific, non-drug intervention to improve sleep quality,” says Dr. Dawson.
“Adults who used the blanket reported improved sleep, reduced use of sleeping pills, and even improved mood and pain management.”
Despite strong evidence for use in adults, research on the use of weighted blankets in children is mixed, and there are limits to their ability to improve sleep in children with conditions such as ADHD and autism spectrum disorders.
“However, some parents report positive results with the use of weighted blankets, and some studies have shown that children’s daily functioning improves after using weighted blankets.”
“Parents often reported that when using blankets, their children seemed more relaxed, less anxious, and more focused in their daily lives. This has been shown to improve children’s overall health can have long-term effects,” Dr. Dawson said.
The authors note that for children and adults with cognitive impairments, the blankets used should be easy to remove on their own.
Although the findings indicate that overnight use of weighted blankets is recommended for adults and can be continued for children, the next step is to develop clear clinical guidelines for blanket use.
“This scoping study was conducted to inform change in practice and its findings were used to change state-wide protocols for the use of weighted blankets across South Australia’s public mental health services. I’m very happy about that,” Dr. Dawson said.
“Blankets come in many different types, including those with beads and chains, and those of varying weights, but there are still no standardized recommendations including type, weight, frequency of use, and duration. .”
“More rigorous research is needed to find out how best to use them, but the practical use of weighted blankets requires further research.”
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Suzanne Dawson others. 2024. Weighted Blankets as a Sleep Intervention: A Scope Review. American Occupational Therapy Journal 78 (5): 7805205160;doi: 10.5014/ajot.2024.050676
A new study shows that about 70% of meteorites originate from at least three recent breakups of giant asteroids.
This is the artist's impression of the asteroid as it breaks apart. Credit: NASA/JPL-California Institute of Technology.
A type of meteorite, commonly called a chondrite, accounts for about 80% of all meteorites that hit Earth, including those that were involved in the violent impact period about 466 million years ago that is thought to have started the Ice Age. Included.
Previous studies have demonstrated that approximately 70% of meteorites on Earth have compositions known as H and L chondrites.
Argon-argon dating of L-chondrite meteorites on Earth suggests that these samples may have originated from the catastrophic destruction of a single asteroid that experienced a supersonic impact approximately 470 million years ago. It turned out to be high.
in new researchESO and MIT researcher Dr. Michael Marcet and colleagues have compiled spectroscopic data from asteroids in the main belt between Mars and Jupiter.
They found that a group of asteroids known as the Massalia family is very similar in composition to L-chondrite meteorites on Earth.
Through computer modeling, they propose that an impact event about 450 million years ago destroyed an L-chondrite asteroid, forming the Massalia family and providing debris that fueled the influx of meteorites.
in second studyCharles University researcher Miroslav Broz and his colleagues found that the current influx of H and L chondrite meteorites was likely caused by three recent breakups.
These events occurred about 5.8, 7.6 and 40 million years ago and involved the destruction of asteroids over 30 km (18.6 miles) in diameter.
More specifically, they suggest that the impact formation of the relatively young Karin and Coronis asteroid families and a second impact event (about 40 million years ago) in the older Massalia asteroids are currently falling to Earth. I guessed that explained most of the meteorites.
in Third, follow-upDr. Brož and his co-authors extended their approach to the entire meteorite family, revealing the major origins of carbonaceous chondrites and achondrites, in addition to those from the Moon, Mars, and Vesta.
“Our discovery provides insight into the mystery of where the most common meteorites that have ever hit Earth came from and how those impacts shaped Earth's history.” ,” the researchers said.
In a study led by Sapienza University in Rome, caffeine intake was positively correlated with the proportion of circulating endothelial progenitor cells in lupus patients.
Orefice others. studied the role of caffeine intake on endothelial function in lupus patients by evaluating the effects of caffeine intake on circulating endothelial progenitor cells. Image credit: Sci.News.
Vascular disease, damage to blood vessels, and the resulting heart attacks and strokes are among the leading causes of death in the general population.
These risks are even higher in patients with inflammatory rheumatic diseases such as lupus and rheumatoid arthritis.
This is due both to the disease itself and to some of its treatments, especially cortisone derivatives.
Until now, doctors’ recommendations for reducing these vascular risks have primarily been about avoiding risk factors.
This includes traditional recommendations such as smoking cessation, reducing cholesterol, and managing high blood pressure, as well as stopping inflammation and reducing the dose of cortisone medications.
But researchers at Rome’s Sapienza University think that doing something that’s actually fun may help patients improve their vascular health.
Research suggests that the caffeine found in coffee, tea, and cocoa helps regenerate the lining of blood vessels and actively supports endothelial progenitor cells, a group of cells involved in blood vessel growth.
Diets rich in vitamin D (found in fatty fish and eggs) and vitamin A (found in many fruits), polyunsaturated fatty acids and low in sodium appear to play a role in reducing inflammatory burden well known.
“We were also wondering about caffeine,” said Dr. Fulvia Ceccarelli and colleagues.
“In addition to its well-known stimulant effects on the body, caffeine also exerts anti-inflammatory effects because it binds to receptors expressed on the surface of immune cells.”
“The effects of caffeine intake on cardiovascular health have been widely investigated, but results are contradictory.”
The study authors surveyed 31 lupus patients without traditional cardiovascular risk factors using a 7-day dietary questionnaire.
After a week, the researchers drew blood from patent patients to measure blood vessel health.
They found that patients who consumed caffeine had better blood vessel health, as measured through the endothelial cells that form the critical lining of blood vessels.
“This study is an attempt to provide patients with information about the possible role of diet in controlling the disease,” said Dr. Ceccarelli.
“The results will need to be confirmed through longitudinal studies aimed at assessing the actual impact of coffee consumption on the course of the disease.”
Mount Everest, also known as Chomolangma in Tibetan and Sagarmatha in Nepali, is about 15 to 50 meters higher than its original height due to uplift caused by erosion of nearby river canyons, and therefore continues to grow. This is revealed in a new study.
Han et al. They found that erosion from a network of rivers about 75 km from Everest had carved out a significant canyon. This landmass loss has caused mountains to rise by 2 mm per year, and their heights have already increased by 15 to 50 meters over the past 89,000 years. Image credit: truthseeker08.
The Himalayas, formed by the subduction of the Indian tectonic plate beneath the Eurasian plate, are home to some of the highest mountains on Earth.
Mount Everest is 8,849 meters above sea level, about 250 meters higher than the other highest peaks in the Himalayas.
Previous analysis of GPS data suggests that Everest's recent uplift is about 2 mm per year, which exceeds the expected uplift rate for the mountain range and suggests that mechanisms other than ongoing regional tectonics are responsible. This suggests that it may contribute to this process.
“Mount Everest is a remarkable mountain of myth and legend, and it continues to grow,” said Dr. Student Adam Smith.
“Our research shows that the nearby river system is cutting deeper and the loss of material is causing the mountain to spring further upwards.”
In this study, Smith and his colleagues investigated whether changes in rivers near the mountain may have contributed to Everest's recent uplift.
They used a numerical model to simulate the evolution of the Kosi river network and compared it to existing landforms.
These models suggest that the Arun River, a major tributary of the Kosi River, was involved in the occupation of another river 89,000 years ago.
The diversion of river water accelerated river erosion as the river adapted to its new path, resulting in the formation of the deep Arun River Gorge.
“Currently, the Arun River flows east of Mount Everest and joins the larger Kosi River system downstream,” Mr Smith said.
“For thousands of years, the River Arun has carved great gorges along its banks, washing away billions of tonnes of soil and sediment.”
“There are interesting river systems in the Everest region,” said Dr. Jing Geng Dai, a researcher at the China University of Geosciences.
“The upper Arun River flows eastward through highlands with flat valleys.''
“Then it suddenly turns south as the Kosi River, dropping in elevation and becoming steeper.”
“This unique feature of instability may be related to Everest's extreme height.”
The authors conclude that although erosion would have lowered local elevations along the river channel, the formation of the canyon removed the eroded mass relatively abruptly, allowing the surrounding landforms, including Everest, to compensate with surface uplift. It is argued that there is a possibility that
Although its contribution may be small compared to tectonic deformation, fluvial capture may play a role in both erosion and uplift of high landforms.
“Everest and its neighboring mountains are growing because isotropic rebound is causing them to rise faster than erosional wear,” said Dr. Matthew Fox, a researcher at University College London. said.
“Using GPS equipment, we can see it grow by about two millimeters every year. Now we can better understand what's causing that.”
“The change in the height of Mount Everest really highlights the dynamic nature of the Earth's surface,” says Dr. Xu Han, a researcher at the China University of Geosciences.
“The interaction between the erosion of the Arun River and the upward pressure of the Earth's mantle gives Everest a boost, pushing it higher than normal.”
of study Published in a magazine natural earth science.
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X Han others. The recent uplift of Chomolungma was reinforced by river drainage piracy. nut. earth sciencepublished online on September 30, 2024. doi: 10.1038/s41561-024-01535-w
Research has shown that the asteroid responsible for the mass extinction that annihilated the dinosaurs 66 million years ago originated from a distant region in the solar system, unlike most asteroids that have collided with Earth.
According to European and American researchers, the dinosaur-killing asteroid formed in a cold area outside Jupiter’s orbit and contained high levels of water and carbon. Survey results The study detailing these findings was published in the journal Science on Thursday.
In their analysis of objects that have struck Earth in the last 500 million years, the researchers noted that only asteroids rich in water have caused mass extinctions like the one that wiped out the dinosaurs. Co-author François Tissot, a professor at the California Institute of Technology, explained that asteroids originating closer to the sun were significantly drier.
Tissot further stated, “All other impacts that occurred were from objects closer to the sun and just happened to hit that specific spot, so the asteroid responsible for the dinosaur extinction is truly unique in both its characteristics and origin.”
This catastrophic asteroid created the Chicxulub crater in Mexico’s Yucatan Peninsula. While direct samples of the asteroid itself were unattainable due to its fragmentation, researchers were able to analyze particles that were dispersed upon impact and settled in Earth’s strata.
The researchers specifically examined ruthenium, a rare element on Earth that can be linked back to the asteroid.
The study confirmed earlier conclusions that classified the asteroid as a carbonaceous, or C-type, asteroid, though some theories proposed it could have been a comet that caused the dinosaur extinction.
Tissot explained, “Comets originate from great distances from the sun and are primarily composed of ice and dust. While the ruthenium levels of a comet have not been measured, based on research indicating other elements, it seems highly improbable that the extinction-causing object was a comet.”
According to Tissot, this study represents progress in understanding the evolution of Earth.
“By delving into Earth’s history, we now have a comprehensive look at its evolution,” he remarked. “This allows us to pose new questions about our planet.”
The asteroid, called the Chicxulub impactor, was a carbonaceous asteroid that formed outside the orbit of Jupiter. New Paper Published in the journal Science.
Ankylosaurus magniventrisA Tyrannosaurus, a type of large armored dinosaur, witnessed the impact of an asteroid that fell on the Yucatan Peninsula 66 million years ago. Image by Fabio Manucci.
About 66 million years ago, a 10-kilometer-wide asteroid struck Earth near what is now a small town called Chicxulub in Mexico.
This impact released incredible amounts of climate-changing gases into the atmosphere, setting off a chain of events that led to the extinction of the non-avian dinosaurs and 75% of life on Earth.
Evidence includes the presence of high concentrations of platinum group elements (PGE) in the Cretaceous-Paleogene boundary layer, including iridium, ruthenium, osmium, rhodium, platinum, and palladium, which are rare on Earth but common in meteorites.
These elevated PGE levels have been found worldwide, suggesting that the impact spread debris around the world.
Some have proposed large-scale volcanism in the Deccan Traps igneous province of India as an alternative source of PGEs, but the specific PGE ratios at the Cretaceous-Paleogene boundary are more consistent with an asteroid impact than volcanism.
However, little is known about the nature of the Chicxulub impactor, including its composition and extraterrestrial origin.
To answer these questions, Dr Mario Fischer-Gödde from the University of Cologne and his colleagues measured ruthenium isotopes in samples taken from three sites at the Cretaceous-Palaeogene boundary.
For comparison, the team also analysed samples from five other impacts that occurred between 36 million and 470 million years ago, an ancient impact spherule from 3.5 to 3.2 billion years ago, and two carbonaceous meteorites.
The researchers found that the ruthenium isotope signature of samples taken from the Cretaceous-Paleogene boundary was uniform and matched very closely to that of carbonaceous chondrites rather than those from Earth or other types of meteorites, suggesting that the Chicxulub impactor likely came from a carbonaceous-type asteroid that formed in the outer solar system.
The other five impact structures have isotopic signatures more consistent with silicic asteroids that formed closer to the Sun.
The ancient spherulitic samples are consistent with a carbonaceous asteroid impact during the final stages of Earth's accretion.
“The composition of this asteroid is consistent with that of carbonaceous asteroids that formed outside Jupiter's orbit during the formation of the solar system,” Dr Fischer-Gödde said.
“Asteroid impacts like Chicxulub turn out to be very rare and unique events in geological time,” said Professor Carsten Müncher from the University of Cologne.
“The fate of the dinosaurs and many other species was sealed by this object that came from the outer solar system.”
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Mario Fischer-Gedde others2024. Ruthenium isotopes indicate that the Chicxulub impactor was a carbonaceous asteroid. Science 385 (6710): 752-756; doi: 10.1126/science.adk4868
The Pyramid of Djoser, also known as the Step Pyramid, is believed to be the oldest of the seven great pyramids, built around 4,500 years ago.
Map of the Saqqara Plateau showing the waterway from the Gisr el-Mudir Dam (left) to the water treatment plant near the Pyramid of Djoser. The water is then routed to the pyramid's network of pipes to power the hydraulic elevators. Image courtesy of Landreau. others., doi: 10.1371/journal.pone.0306690.
The Pyramid of Djoser, built around 2680 BC at Saqqara in Egypt, is considered a major milestone in monumental architecture.
This revealed for the first time two important innovations: the pyramidal shape of the pharaoh's tomb and the use of only perfectly finished stones in the masonry.
In fact, the ability to extract, lift and precisely stack millions of stones is also revolutionary.
Such were the complex and visible achievements of King Djoser that his architect, vizier and great priest of Ra, Imhotep, was deified during the New Kingdom.
In a new interdisciplinary analysis, Dr. Xavier Landreau of the CEA Palaeotechnical Institute and his colleagues have found that hydraulic lifts may have been used in the construction of the pyramid.
Based on their mapping of nearby watersheds, the authors found that one of Saqqara's large unexplained structures, the Gisr el-Mudir Enclosure, has the characteristics of a check dam intended to capture sediment and water.
Additionally, a series of compartments dug into the ground outside the pyramid may have acted as water treatment plants, allowing sediment to settle as water passed through each compartment.
This would have allowed the water to flow into the pyramid's columns themselves, and its upward force could have carried the building stones along.
More research is needed to understand how water flowed through the tunnels and how much water was present on the land at that point in Earth's history.
However, archaeologists suggest that while other building methods such as ramps may have been used to construct the pyramids, if there was enough water a hydraulic lift system may have been used to support the building process.
“The internal structure of the step pyramid is found to be consistent with a previously unreported mechanism for hydraulic build-up,” the researchers said.
“The ancient builders may have used sediment-free water from the south side of the dry moat to raise the stones from the center of the pyramid in a volcanic fashion.”
“The ancient Egyptians are famous for being pioneers and masters of hydraulics, including irrigation canals and barges for transporting megaliths.”
“This research opens up a new field of research into the use of water power to build the massive structures erected by the Pharaohs.”
of study Published online in the journal PLoS One.
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X. Landreau others2024. On the possibility of using hydropower to aid in the construction of the Step Pyramid at Saqqara. PLoS One 19 (8): e0306690; doi: 10.1371/journal.pone.0306690
Göbekli Tepe, an archaeological site in southern Turkey, features several Neolithic temple-like enclosures decorated with many intricately carved symbols.
Göbekli Tepe (Turkish for “Pot-bellied Hill”) is one of the oldest known examples of an artificial megalithic structure constructed by prehistoric builders specifically for ritual purposes.
Its impressive monumental architecture was built by a group of hunter-gatherers during the Pre-Pottery Neolithic period between 9600 and 8200 BC.
Göbekli Tepe was discovered towards the end of the last century in a hillside overlooking the Harran Plain.
It lies between the upper reaches of the Euphrates and Tigris rivers, about 12 km northeast of the modern city of Şanlıurfa, known as Ancient Urfa and said to be the birthplace of the biblical Abraham.
Excavations at Göbekli Tepe, which began in 1994, have uncovered four large, nearly circular enclosures and a number of smaller, generally rectangular, buildings.
Each circular enclosure consists of rough stone walls with T-shaped megalithic pillars inset around two centrally located tall T-shaped pillars, which are usually fixed within stone sockets.
Archaeologists initially thought that Göbekli Tepe was merely a religious center, but recent excavations have revealed that it also contained a settlement of rectangular buildings, now thought to be homes.
The large enclosures are still considered “special” buildings, although there is debate as to whether they had a specific religious purpose or were large homes for powerful families.
In the context of this debate, it is debated whether the largest pillars represent gods or even worshipped ancestors.
In any case, it is generally believed that these large enclosures were roofed, but hard evidence is elusive.
A round-elliptical monumental structure with a distinctive T-shaped monolithic pillar at Göbekli Tepe, Turkey. Image credit: Nico Becker, Göbekli Tepe Archive, German Archaeological Institute.
“The largest complete enclosure discovered so far, Enclosure D (30 metres, 98 feet wide), has the oldest radiocarbon date yet obtained from the site, dating to 9530 BC,” said archaeologist David Schneider of the University of Edinburgh. paper Published in the journal Time and Heart.
“This date corresponds roughly to the end of the Younger Dryas period, at the boundary between the Epipaleolithic and Neolithic, when the Northern Hemisphere climate suddenly warmed after a near-glacial Younger Dryas climate that lasted for more than 1,200 years.”
“However, the date of the earliest occupation of Göbekli Tepe is unknown,” he added.
“Ground penetrating radar scans indicate that there appear to be several other large structures near the center of the main trail, waiting to be discovered.”
“Since only a small portion of the site's surface has been excavated, and even less has been excavated down to bedrock, the origins of Göbekli Tepe may ultimately be dated back to a time closer to the beginning of the Younger Dryas period, around 10,800 BC.”
“In fact, scientists have suggested it may have originated in the Paleolithic period.”
In a new analysis of the V-shaped symbols carved into the pillars at Göbekli Tepe, Dr Sweatman found that each V likely represents a day.
This interpretation allowed researchers to count a 365-day solar calendar consisting of 12 lunar months and 11 extra days on one of the pillars.
The summer solstice was considered a special day, and a V was drawn around the neck of a bird-like beast, which was thought to represent the summer solstice constellation at the time.
Other statues believed to represent gods were found nearby, all with similar V-shaped markings around their necks.
As both lunar and solar cycles are depicted, the carving may represent the world's oldest known lunisolar calendar, based on the phases of the moon and the position of the sun, predating any other known calendar of this type by thousands of years.
Detail of the center section of Pillar 43 at Göbekli Tepe. Image courtesy of Martin B. Sweatman, doi: 10.1080/1751696X.2024.2373876.
“Ancient people may have created these carvings at Göbekli Tepe to record the date when a swarm of cometary fragments hit Earth about 13,000 years ago, i.e. in 10,850 BC,” the scientists said.
“The cometary impact is thought to have caused a mini-glacial period lasting more than 1,200 years and led to the extinction of many large animal species.”
“It may also have triggered changes in lifestyle and agriculture that are associated with the emergence of civilisations in the Fertile Crescent of Western Asia shortly thereafter.”
Another pillar at the site appears to depict the Taurid meteor shower, which emanated over a 27-day period from the direction of Aquarius and Pisces, and is thought to be the source of cometary debris.
The discovery also appears to confirm that ancient peoples were able to use precession — the wobble of the Earth's axis that affects the movement of the constellations in the sky — to record dates at least 10,000 years before it was recorded by the ancient Greek Hipparchus in 150 BC.
The carvings appear to have been important to the people of Göbekli Tepe for thousands of years, suggesting that the impact event may have sparked new cults and religions that influenced the development of the civilization.
The discovery also supports the theory that Earth's orbit crosses the path of orbiting cometary debris that we normally experience as meteor showers, increasing the chances that Earth will face cometary impacts.
“The inhabitants of Göbekli Tepe are likely to have been avid skywatchers, which is not surprising given that their world was devastated by a cometary impact,” Dr Sweatman said.
“This event may have marked the beginning of a new religion and may have sparked civilization by encouraging the development of agriculture to cope with the cold climate.”
“Perhaps their attempt to record what they saw was the first step towards the development of writing thousands of years later.”
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Martin B. Sweatman. The representations of calendar and time at Göbekli Tepe and Karahan Tepe support an astronomical interpretation of their symbols. Time and HeartPublished online July 24, 2024, doi: 10.1080/1751696X.2024.2373876
Use of Data ESA's Gaia mission Astronomers have discovered a number of metal-poor stars that are more than 13 billion years old and in orbits similar to our sun.
Rotational motion of a young (blue) and an older (red) star similar to the Sun (orange). Image credit: NASA / JPL-Caltech / R. Hurt / SSC / Caltech.
“The Milky Way has a large halo, a central bulge and bar, and thick and thin disks,” said Dr Samir Nepal of the Leibniz Institute for Astrophysics Potsdam and his colleagues.
“Most of the stars are found in a thin disk of the so-called Milky Way galaxy, which revolves regularly around the galactic center.”
“Middle-aged stars like our Sun, which is 4.6 billion years old, belong to a thin disk that is generally thought to have begun to form between 8 and 10 billion years ago.”
Astronomers used the new Gaia data set to study stars within about 3,200 light-years of the Sun.
They found a surprisingly large number of very old stars in the thin disk orbit, most of which are over 10 billion years old, with some being over 13 billion years old.
These ancient stars show a wide range of metal compositions: some are very metal-poor (as expected), while others have twice the metal content of the much younger Sun, indicating that rapid metal enrichment occurred early in the evolution of the Milky Way.
“These ancient stars in the disk suggest that the formation of the Milky Way's thin disk began much earlier than previously thought, around 4 to 5 billion years ago,” Dr Nepal said.
“This study also reveals that the Galaxy underwent intense star formation early on, leading to rapid metal enrichment in its inner regions and the formation of a disk.”
“This discovery brings the Milky Way's disk formation timeline into line with that of high-redshift galaxies observed with the NASA/ESA/CSA James Webb Space Telescope and the Atacama Large Millimeter Array (ALMA).”
“This shows that cold disks can form and stabilize very early in the history of the universe, providing new insights into the evolution of galaxies.”
“Our study suggests that the Milky Way's thin disk may have formed much earlier than previously thought and that its formation is closely linked to an early chemical enrichment in the innermost regions of the galaxy,” said Dr Cristina Chiappini, astronomer at the Leibniz Institute for Astrophysics Potsdam.
“The combination of data from different sources and the application of advanced machine learning techniques has allowed us to increase the number of stars with high-quality stellar parameters, which is an important step leading our team to these new insights.”
Samir Nepal others2024. Discovery of local counterparts of disk galaxies at z > 4: The oldest thin disk in the Milky Way using Gaia-RVS. A&Ain press; arXiv: 2402.00561
A new study led by Western Washington University suggests that sister city relationships have been around for longer than we thought.
Jack H. McBride and Tesla A. Monson conducted a comprehensive study of primate offspring numbers using life history data from 155 primate species and offspring numbers from an additional 791 mammal species. Image by Jason Brougham.
“Nearly all primates give birth to a single litter,” say Tesla Monson, a professor at Western Washington University, and Jack McBride, a doctoral student at Yale University.
“However, some genera, such as marmosets, tamarins, lemurs, lorises, and galagos, regularly give birth to twins or triplets.”
“Although humans most often give birth to singletons, twin pregnancies occur naturally at a rate of approximately 1.1-1.5% worldwide.”
“Advances in assisted reproductive technology have increased twin birth rates to around 3% in some areas over the past 50 years.”
“There is an urgent need to understand the impact of twins on pregnancy, mothers, and newborns.”
In this study, the authors collected data on reproduction and body size from nearly 1,000 different mammalian species to investigate the evolutionary history of twinning in primates.
The traits they analyzed included offspring size (number of offspring), gestation period, body size, and lifespan.
Contrary to previous assumptions, the analysis demonstrates that the earliest primates likely gave birth to twins.
The researchers also found that birth size and gestational age (the length of pregnancy) were closely related.
“Animals that give birth to more pups on average tend to have shorter gestation periods,” Professor Monson said.
“This also applies to humans. In the United States, full-term twins are considered to be born at 38 weeks, not 40 weeks, and many twins are born earlier than that.”
“This may be related to maternal energy limitations.”
“The next step is to look more broadly at offspring number across mammals and see which other reproductive, brain, and body size traits are associated with twinning.”
“We are particularly interested in understanding the relationship between twinning and tooth morphology.”
According to a recent study conducted by researchers from Bond University, University of Helsinki, and Helsinki University Hospital, increasing fluid intake can help reduce the occurrence of urinary tract infections (UTIs) compared to no treatment. However, consuming cranberry juice has shown even better clinical outcomes in terms of decreased UTIs and antibiotic usage, suggesting that it should be considered as a management option for UTIs.
Cranberry juice drinkers are 54% less likely to develop a urinary tract infection. Image courtesy of The Loves of Eirlys.
“Urinary tract infections are one of the most common bacterial infections,” stated lead author Christian Moro, PhD, along with his colleagues.
“Over 50% of women and more than 20% of men will experience UTIs at least once in their lifetime, making it the most prevalent bacterial infection in children.”
“While antibiotics have traditionally been effective for UTI treatment, the growing resistance of bacteria to these drugs poses a challenge.”
“Studies have shown that over 90% of UTIs contain drug-resistant bacteria, many of which are resistant to multiple antibiotics.”
“Given the rise in microbial resistance to antibiotics, it is essential to explore evidence-based non-drug interventions for UTI prevention and treatment.”
“Reducing antibiotic usage will not only alleviate the financial and clinical burden of prescriptions but also address the increasing issue of antibiotic resistance.”
“Encouraging patients to increase fluid intake and incorporating cranberry juice or tablets have been proposed as beneficial strategies.”
“However, the existing literature on this topic is extensive, with conflicting findings regarding the effectiveness of cranberries.”
The authors utilized a novel research approach known as network meta-analysis, enabling simultaneous comparisons of multiple interventions across various studies.
A total of 20 trials involving 3,091 individuals were analyzed, with 18 of these studies revealing that cranberry juice consumption was linked to a 54% lower UTI incidence compared to no treatment and a 27% lower incidence than placebo liquids.
“These results have the potential to reduce the reliance on antibiotics for UTI treatment,” commented Dr. Moro.
“More than half of women will experience a UTI, often resulting in antibiotic prescriptions.”
“Given the escalating antibiotic resistance, identifying effective non-pharmaceutical interventions is critical.”
“Cranberry juice presents a straightforward and effective intervention that should be considered in managing UTIs.”
Furthermore, the study found that cranberry juice led to a 59% reduction in antibiotic requirements and significantly alleviated symptoms in individuals with active UTIs.
“Simple measures like increasing water intake or taking cranberry tablets also showed benefits, albeit not as pronounced as consuming cranberries in liquid form such as juice,” the researchers noted.
Read their paper published in the journal European Urology Focus.
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Christian Moro others Cranberry juice, cranberry tablets, or liquid therapy for urinary tract infections: a systematic review and network meta-analysis. Yurol Focus Published online on July 18, 2024; doi: 10.1016/j.euf.2024.07.002
This article is based on a press release provided by Bond University.
Europa and Enceladus are important targets for the search for evidence of extraterrestrial life in the solar system. However, the surfaces and shallow subsurfaces of these airless icy moons are constantly exposed to ionizing radiation that can degrade chemical biosignatures. Therefore, sampling the icy surfaces in future life-searching missions to Europa and Enceladus requires a clear understanding of the required ice depths where intact organic biomolecules may exist. A team of scientists from NASA and Pennsylvania State University conducted experiments exposing individual biological and abiotic amino acids in the ice to gamma radiation to simulate conditions on these icy worlds.
Europa's surface stands out in this newly reprocessed color image. The image scale is 1.6 km per pixel. Europa's north side is on the right. Image courtesy of NASA / JPL-Caltech / SETI Institute.
“Based on our experiments, a 'safe' sampling depth for amino acids on Europa is about 20 centimetres (8 inches) at high latitudes in the trailing hemisphere (the hemisphere opposite the direction Europa moves around Jupiter), in an area where the surface has not been significantly disturbed by meteorite impacts,” said Dr. Alexander Pavlov, a research scientist at NASA's Goddard Space Flight Center.
“Detecting amino acids on Enceladus does not require subsurface sampling; these molecules survive radiolysis (breakdown by radiation) anywhere on Enceladus' surface, within a few millimeters (tenths of an inch) of the surface.”
Dr. Pavlov and his colleagues used amino acids in their radiolysis experiments as representative examples of biomolecules on icy moons.
Amino acids are produced by both living organisms and non-living processes.
But if certain types of amino acids were found on Europa or Enceladus, they could be a sign of life, as they may be used by life on Earth as building blocks of proteins.
Proteins are essential for life because they are used to create structures and to produce enzymes that speed up or control chemical reactions.
Amino acids and other compounds found underground in the ocean could be transported to the surface by geyser activity or the slow churning motion of the ice shell.
To assess the survival of amino acids on these planets, the researchers mixed amino acid samples with ice cooled to minus 196 degrees Celsius (minus 321 degrees Fahrenheit) in sealed, airless vials and exposed them to various doses of gamma rays (a type of high-energy light).
Because the ocean may harbor microorganisms, the researchers also tested the viability of amino acids contained in dead bacteria in the ice.
Finally, the researchers tested samples of amino acids in the ice mixed with silicate dust to see if meteorites or interior materials could be mixing with the surface ice.
This experiment provided vital data for determining the rate at which amino acids break down (called the radiolysis constant).
Using these, the scientists used the age and radiation environment of the icy surfaces of Europa and Enceladus to calculate drilling depths and where 10% of amino acids would survive radiolysis.
While experiments have been done before to test for the survival of amino acids in ice, this is the first to use low doses of radiation that don't completely break down the amino acids – changing or breaking them down would be insufficient to determine whether they were a sign of life.
This is also the first experiment to use Europa/Enceladus conditions to assess the survival of these compounds in microbes, and the first to test the survival of amino acids mixed with dust.
Scientists have found that amino acids break down faster when mixed with dust, but more slowly when they come from microorganisms.
“The slow rate of breakdown of amino acids in biological samples under surface conditions like those on Europa and Enceladus strengthens the case for future life detection measurements from lander missions to Europa and Enceladus,” Dr Pavlov said.
“Our results indicate that the decomposition rates of potential organic biomolecules are higher in the silica-rich regions of both Europa and Enceladus than in pure ice. Future missions to Europa and Enceladus should therefore be careful when sampling the silica-rich regions of these icy moons.”
“A possible explanation for why amino acids survive longer in bacteria is the way that ionizing radiation alters molecules, either directly by breaking chemical bonds or indirectly by creating nearby reactive compounds that alter or break down the target molecule.”
“It's possible that the bacterial cellular material protected the amino acids from reactive compounds produced by the radiation.”
Alexander A. Pavlov others2024. Effects of radiolysis on biological and abiotic amino acids in shallow subsurface ice on Europa and Enceladus. Astrobiology 24(7); doi: 10.1089/ast.2023.0120
This article has been edited based on the original NASA release.
Illustration showing LUCA possibly being attacked by a virus
Scientific Graphic Design
The organisms that gave rise to all life on Earth evolved much earlier than previously thought – just a few hundred million years after Earth formed – and may have been more sophisticated than previous assessments had suggested.
The DNA of all living organisms today is E. coli There are many similarities in the evolution leading up to the blue whale, suggesting that we can trace our origins back to a universal common ancestor, LUCA, billions of years ago. While many efforts have been made to understand LUCA, studies taking a broader approach have revealed surprising results.
“What we're trying to do is bring together representatives from different disciplines to develop a comprehensive understanding of when LUCA existed and what its biological characteristics were,” he said. Philip Donahue At the University of Bristol, UK.
Genes that are currently present in all major lineages of life may have been passed down uninterrupted from LUCA, which could help us understand what genes our ancient ancestors had. By studying how these genes changed over time, we should be able to estimate when LUCA lived.
In reality, this is a lot more complicated than it sounds, as genes are lost, gained, and swapped between branches. Donohue says the team created a complex model that took this into account, to work out which genes were present in LUCA. “We've found a much more sophisticated organism than many have previously claimed,” he says.
The researchers estimate that 2,600 protein-coding genes come from LUCA, up from previous estimates of as few as 80. The team also concludes that LUCA lived around 4.2 billion years ago, much older than other estimates and surprisingly close to the formation of Earth 4.5 billion years ago. “This suggests that the evolution of life may have been simpler than previously claimed, because evolution happened so quickly,” Donohue says.
The earlier date is largely due to the team's improved methodology, but also because, unlike others, they don't assume that LUCA could have existed only after the Late Heavy Bombardment, when Earth was hit so hard by space debris that any new life that emerged could have been wiped out. Based on rocks returned from the Moon, the period has been put at 3.8 billion years ago, but there's a lot of uncertainty around that number, Donohue says.
Their reconstruction suggests that LUCA had genes that protected it from ultraviolet damage, which leads them to believe that it likely lived on the ocean's surface. Other genes suggest that LUCA fed on hydrogen, which is consistent with previous findings. The team speculates that LUCA may have been part of an ecosystem with other types of primitive cells that are now extinct. “I think it's extremely naive to think that LUCA existed on its own,” Donohue says.
“I think this is compelling from an evolutionary perspective.” Greg Fournier “LUCA is not the beginning of the story of life, but merely the state of the last common ancestor that we can trace back to using genomic data,” say researchers from the Massachusetts Institute of Technology.
The results also suggest that LUCA had a primitive version of the bacterial defense system known as CRISPR to fight viruses. “Even 4.2 billion years ago, our earliest ancestors were fighting viruses,” the team members say. Edmund Moodyalso at the University of Bristol.
Peering into the distant past is fraught with uncertainty, and Donohue is the first to admit that his team may have missed the mark. “We've almost certainly got it all wrong,” he says. “What we're trying to do is push the envelope and create the first attempt to synthesize all of the relevant evidence.”
“This won't be the last word,” he said, “and it won't be our last word on this subject, but we think it's a good start.”
Patrick Forter Researchers at the Institut Pasteur in Paris, France, who coined the term LUCA, also believe that the organism did not live in isolation. “But the claim that LUCA lived before the Late Heavy Bombardment 3.9 billion years ago seems to me completely unrealistic,” says Forterre. “I'm convinced that their strategy for determining the age and gene content of LUCA has several flaws.”
In a new study, planetary scientists have found strong similarities between the soil of Gale Crater on Mars and that of the cold, sub-Arctic climate of Newfoundland, Canada.
X-ray amorphous material comprises 15-73% by weight of the sedimentary rocks and eolian deposits in Gale Crater. This material is siliceous and high in iron and low in aluminum. The presence of volatiles is consistent with the presence of early weathering products. To better understand the impact of this material on past water conditions on Mars, Feldman and others used bulk and selective dissolution techniques, X-ray diffraction, and transmission electron microscopy to investigate the formation and lifetime of X-ray amorphous material in terrestrial iron-rich soils of different ages and environmental conditions. Image courtesy of M. Kornmesser / ESO.
Scientists often use soil to portray environmental history, as the minerals it contains can tell the story of a landscape's evolution over time.
Understanding more about how these materials formed could help answer long-standing questions about the Red Planet's historical conditions.
The soil and rocks in Gale Crater are a record of a climate that existed 3 to 4 billion years ago, when Mars was relatively water-rich, coinciding with the time when life first emerged on Earth.
“Gale Crater is an ancient lake bed and clearly water was present, but what were the environmental conditions like when the water was there?” said Dr Anthony Feldman, a soil scientist and geomorphologist at the Desert Institute.
“We'll never find a direct analogue on the Martian surface because conditions on Mars and Earth are so different, but we can look at trends under Earth conditions and apply them to problems on Mars.”
NASA's Curiosity rover has been exploring Gale Crater since 2011 and has found large amounts of soil material known as X-ray amorphous material.
These components of soil lack the typical repeating atomic structure that characterizes minerals and therefore cannot be easily characterized using traditional techniques such as X-ray diffraction.
For example, when a crystalline material like diamond is hit with X-rays, the rays scatter at characteristic angles based on the mineral's internal structure.
However, X-ray amorphous materials do not produce these characteristic fingerprints.
This X-ray diffraction method was used by the Curiosity rover to demonstrate that soil and rock samples tested in Gale Crater consisted of 15-73% X-ray amorphous material.
“Think of X-ray amorphous material as being like jelly, which is a soup of different elements and chemicals that slide around one another,” Dr. Feldman said.
Curiosity also conducted chemical analysis of soil and rock samples and found that the amorphous material was rich in iron and silica and deficient in aluminum.
Beyond limited chemical information, scientists don't yet understand what this amorphous material is or what its presence means about Mars' historical environment.
Uncovering more information about how these enigmatic materials formed and persist on Earth could help answer long-standing questions about the Red Planet.
Dr. Feldman and his colleagues visited three locations in their search for similar X-ray amorphous material: the Tablelands of Gros Morne National Park in Newfoundland, the Klamath Mountains in Northern California, and western Nevada.
All three sites contain serpentinite soils that the researchers predicted would be chemically similar to the X-ray amorphous material in Gale Crater, meaning it would be rich in iron and silicon but poor in aluminum.
The three locations also recorded ranges of rainfall, snowfall and temperatures, which could help provide insight into the types of environmental conditions that produce amorphous material and promote its preservation.
At each site, the team examined the soil using X-ray diffraction analysis and transmission electron microscopy, allowing them to see the soil material at a more detailed level.
The subarctic climate of Newfoundland produced materials chemically similar to those found at Gale Crater, but lacked the crystalline structure, whereas soils produced in warmer climates such as California and Nevada did not produce the crystalline structure.
“This tells us that you need water there to form these materials,” Dr. Feldman said.
“But to preserve the amorphous material in the soil, the average annual temperature needs to be cold, close to freezing.”
Amorphous materials are often considered to be relatively unstable, meaning that at the atomic level, the atoms have not yet organized into a final crystalline form.
“Something is happening in the rates, or kinetics, of the reactions that slows them down so that these materials are preserved over geological timescales,” Dr Feldman said.
“What we're suggesting is that very cold conditions, close to freezing, are the specific kinetic limiting factors that allow these materials to form and be preserved.”
“This research improves our understanding of the Martian climate.”
“The results suggest that the abundance of this material in Gale Crater is consistent with subarctic conditions similar to those found in Iceland, for example.”
Team work Published in a journal Communication Earth and the Environment.
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A.D. Feldman othersIn 2024, iron-rich X-ray amorphous material will record Mars' past climate and the persistence of water. Community Global Environment 5, 364; doi: 10.1038/s43247-024-01495-4
This article is based on a press release from the Desert Research Institute.
Jupiter’s Great Red Spot is perhaps the best-known atmospheric feature and a popular icon among the solar system’s objects. Its large oval shape, contrasting red color, and long lifespan make it easily visible with a small telescope. A new study led by scientists from the University of the Basque Country, based on historical measurements of its size and motion, shows that the present-day Great Red Spot was probably first reported in 1831 and is not a permanent spot observed by Giovanni Domenico Cassini and others between 1665 and 1713.
The Permanent Spot (PS) and the early Great Red Spot (GRS): (a) drawing of the PS by GD Cassini on 19 January 1672, (b) drawing by S. Swave on 10 May 1851, showing the GRS area as a clear ellipse bounded by a depression (depicted by a dashed red line). (c) photograph taken by AA Common on 3 September 1879 using a 91 cm reflecting telescope at Ealing (London). The GRS appears as a clear "dark" ellipse because it is red and the photographic plate is sensitive to violet-blue wavelengths. (d) photograph taken at Lick Observatory on 14 October 1890 using a yellow filter. All figures show astronomical images of Jupiter (south at top, east at left) to preserve the notes on the drawings. Image courtesy of Sánchez-Lavega others., doi: 10.1029/2024GL108993.
Jupiter’s Great Red Spot is the largest and longest-lasting known vortex of any planet in the solar system.
The formation mechanism that produced this feature is unknown, and its longevity is controversial.
It was also unclear whether the Great Red Spot was the dark oval nicknamed the “Eternal Spot” that astronomer Giovanni Domenico Cassini and others reported between 1665 and 1713.
“Speculation about the origin of the Great Red Spot dates back to the first telescopic observations by Giovanni Domenico Cassini, who in 1665 discovered a dark oval at the same latitude as the Great Red Spot, which he named a permanent spot, because it was observed by Cassini and other astronomers until 1713,” said Professor Agustin Sánchez Lavega from the University of the Basque Country.
“For the next 118 years, traces of it were lost, and it was only after 1831 that S. Schwabe again observed a clear, almost elliptical structure at the same latitude as the GRS. This can be considered the first observation of the present-day GRS, possibly of the infant GRS.”
“Since then, the Great Red Spot has been regularly observed by telescopes and by various space probes that have visited the planet up to the present day.”
In their study, the authors analysed the change in the size of the Great Red Spot over time, its structure, and the behaviour of two meteorological structures, the former permanent spot and the Great Red Spot.
To do so, they used historical sources dating back to the mid-17th century, shortly after the telescope was invented.
“Based on our measurements of its size and motion, we infer that it is highly unlikely that the current Great Red Spot is the permanent spot observed by Cassini,” Professor Sanchez LaVega said.
“The permanent spot probably disappeared sometime between the mid-18th and 19th centuries, which would put the lifespan of the red spot at least 190 years.”
“The Red Spot, which in 1879 measured 39,000 kilometres along its longest axis, has now shrunk to about 14,000 kilometres and is becoming rounder at the same time.”
“Furthermore, since the 1970s, several space missions have studied this weather phenomenon in detail.”
“Recently, various instruments on the Juno spacecraft in orbit around Jupiter have shown that the Great Red Spot is shallow and thin compared to its horizontal length. Its vertical length is about 500 km.”
To understand how this giant whirlpool formed, the astronomers ran numerical simulations using two complementary models of the behavior of thin vortices in Jupiter’s atmosphere.
Powerful winds prevail on this giant planet, flowing along parallels that alternate in direction and latitude.
To the north of the Great Red Spot, winds blow westward at 180 km/h, while to the south, winds blow in the opposite direction, eastward at 150 km/h.
This creates huge north-south shear in the wind speed, which is the fundamental element that allows vortices to grow internally.
The study explored a variety of mechanisms to explain the formation of the Great Red Spot, including the eruption of a giant superstorm like those rarely observed around its twin planet Saturn, or the merging of several smaller vortices caused by sheared winds.
The results show that although anticyclones form in both cases, their shapes and dynamic characteristics are different from those of the present-day Great Red Spot.
“We believe that if one of these anomalies had occurred, it, or its effects in the atmosphere, would have been observed and reported by astronomers at the time,” Prof Sanchez Lavega said.
In a third set of numerical experiments, the researchers investigated how the GRS may arise from known instabilities in the winds that they believe could produce elongated cells that surround and trap the GRS.
Such cells were early red spots, the proto-Great Red Spot, whose subsequent shrinkage would give rise to the compact, rapidly rotating Great Red Spot observed in the late 19th century.
The formation of large elongated cells has already been observed during the emergence of other major vortices on Jupiter.
“In our simulations, thanks to supercomputers, we were able to find that elongated cells are stable when they rotate around the Great Red Spot at the speed of Jupiter’s winds, which is what you would expect to form due to this instability,” said Dr Enrique García Melendo, an astronomer at the Polytechnic University of Catalonia.
Using two different numerical models, the scientists concluded that if the GRS rotated slower than the surrounding winds, it would break up and the formation of a stable vortex would be impossible.
And if it were very high, the properties of the primordial Great Red Spot would be different from those of the current Great Red Spot.
“Future studies will aim to reconstruct the Great Red Spot’s shrinkage over time and elucidate in more detail the physical mechanisms underlying its persistence,” the authors wrote.
“At the same time, we try to predict whether the Great Red Spot will collapse and disappear when it reaches its size limit, as happened with Cassini’s permanent spot, or whether it will remain stable at its size limit and persist for many years.”
of result Published in a journal Geophysical Research Letters.
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Agustin Sanchez Lavega others2024. Origin of Jupiter’s Great Red Spot. Geophysical Research Letters 51(12):e2024GL108993; doi:10.1029/2024GL108993
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