Archaeologists Uncover Possible 2,100-Year-Old Temple in Egypt

Archaeologists have uncovered an entrance to a large stone temple in an ancient Egyptian town, Athribis, near the modern city of Sohag.



The south tower of the Athribis pylon and the hill behind it. It is believed that there is a sanctuary here. Image credit. Marcus Müller, Athribis Project.

“The entrance to the temple in the rock appears to lie beneath a still-untouched pile of rubble behind it,” said archaeologists Professor Christian Reitz and Dr Markus Müller from the University of Tübingen.

“Since 2022, we have been working with Mohamed Abdelbadia of the Egyptian Antiquities Authority and the Egyptian team at Asribis to excavate the large stone temple.”

“Excavations have been underway since 2012 to reveal an ancient temple district built between 144 BC and 138 AD.”

“The width of the complex was a total of 51 meters, and the monumental temple entrance towers were each 18 meters high.”

“Today there is only about five meters left. The rest was sacrificed to quarrying,” they added.

“Thanks to the fallen coins, the removal of this stone may have taken place in 752 or shortly thereafter.”

Archaeologists also discovered a relief of a king offering a sacrifice to the lion-headed goddess Lepit and her son Kolantes.

A newly discovered hieroglyphic inscription reveals for the first time which king was responsible for the decoration of the pylon, and perhaps also for its construction: Ptolemy VIII in the 2nd century BC.

“We unexpectedly encountered a previously unknown chamber in the northern tower,” the researchers said.

“We used air cushions, wooden scaffolding and rollers to remove ceiling blocks weighing approximately 20 tonnes.”

“We found a chamber about 6 meters long and 3 meters wide.”

“It was a storage room for temple utensils and was later used to store amphora.”

“A corridor led to the room through a pylon, allowing access from outside.''

“This entrance is also decorated with reliefs and hieroglyphs,” they added.

“Once again we see the goddess Lepit, but on the opposite door frame the fertility god Min is depicted, along with two very rarely depicted beings, the falcon-headed decan (who can measure the hours of the night) It is accompanied by a star.

“Unique in Egyptian temple architecture is the second door in the façade of the pylon, which opens onto a previously unknown staircase that led to the upper floors on at least four floors. It has now been destroyed and further storage rooms may be rebuilt there.”

“Finely smoothed limestone blocks in vertically cut rock facades may belong to rock sanctuaries,” says Professor Wrights.

“The finds over 3 meters high and the typical decorations at the top of the temple, such as the cobra frieze, indicate that there may have been a door behind the temple.”

Source: www.sci.news

Scientists uncover innovative method to transform carbon dioxide into methane

A new class of atomically dispersed nickel catalysts directly converts trapped carbon dioxide (CO)2 to methane (CH4), according to Tomaz Neves García, Ph.D., a postdoctoral researcher at The Ohio State University, and colleagues.

Direct electrochemical reduction of carbon dioxide scavenging species, namely carbamates and (bi)carbonates, may be promising for carbon dioxide capture and conversion from point sources. Image credit: Neves Garcia others., doi: 10.1021/jacs.4c09744.

Carbon dioxide is the greenhouse gas responsible for most of global warming and is produced by power plants, factories, and various forms of transportation.

Typical carbon capture systems, aimed at reducing the presence of carbon dioxide in the atmosphere, reduce carbon dioxide emissions by separating carbon dioxide from other gases and converting it into useful products. .

However, the operation of these systems requires large amounts of energy, making this process difficult to implement on an industrial scale.

“Now we have found a way to save much of this precious energy by using a special nickel-based catalyst to convert the captured carbon dioxide directly into methane,” said Dr. Neves Garcia.

By using nickel atoms placed on a charged surface, Dr. Neves-Garcia and his co-authors were able to convert carbamates, a scavenging form of carbon dioxide, directly into methane.

They discovered that nickel atoms, an inexpensive and widely available catalyst, were very good at this transformation.

“We are producing high-energy fuels from low-energy molecules,” said Dr. Neves Garcia.

“What's so interesting about this is that while other companies are capturing, capturing and converting carbon in stages, we're saving energy by doing these steps simultaneously. is.”

Most importantly, streamlining the carbon capture process will help scientists reshape what they know about the carbon cycle and inform more complex strategies for faster and more efficient climate mitigation technologies. This is an important step to establish.

“We need to focus on minimizing the energy spent on carbon capture and conversion as much as possible,” said Dr. Neves García.

“So instead of performing all the capture and conversion steps separately, we can integrate it into one step and avoid wasted energy processes.”

“Many carbon capture methods are still in their infancy, but this is a promising field as researchers from a variety of disciplines are working on improvements.”

“Using renewable electricity to convert carbon dioxide into fuel has the potential to end the carbon cycle.”

“For example, when methane is burned to produce energy, it emits carbon dioxide, which can be captured and converted back into methane to support a continuous energy production cycle without adding to the planet's global warming burden. It may be possible.”

The study also represents the first time researchers have discovered that carbamates can be converted to methane using electrochemistry.

Many attempts have been made to convert the captured carbon dioxide into useful products, but so far most researchers have only shown the ability to produce carbon monoxide.

“Methane can be a very interesting product, but most importantly it opens the way to developing further processes to convert the captured carbon dioxide into other products” Neves Garcia said the doctor.

of the team work Published in Journal of the American Chemical Society.

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tomas neves garcia others. 2024. Integrated capture and conversion of carbon dioxide to methane with amines over single-atom nickel catalysts. J.Am. Chemistry. society 146 (46): 31633-31646;doi: 10.1021/jacs.4c09744

Source: www.sci.news

Archaeologists uncover ancient alphabet, the oldest ever found

According to Professor Glenn Schwartz of Johns Hopkins University, the script dates from around 2400 B.C., making it roughly 500 years older than any other known alphabet.

A 4,400-year-old clay object discovered in the ancient city of Umm El Mara in Syria. The carved symbols may be part of the oldest known alphabet. Image credit: Glenn Schwartz, Johns Hopkins University.

“The alphabet revolutionized writing by making it accessible to people beyond royalty and social elites. Alphabet writing changed the way people lived, thought, and communicated.” said Professor Schwartz.

“And this new discovery shows that people were experimenting with new communication technologies in different places much earlier than previously imagined.”

The letters of this alphabet are carved into finger-long clay cylinders excavated at Tell Um-el-Mara, one of the first medium-sized cities to emerge in western Syria.

In Umm El Mara, archaeologists have discovered tombs dating back to the early Bronze Age.

One of the best-preserved tombs contained six skeletons, gold and silver jewelry, cooking utensils, spear points, and intact ceramic vessels.

Next to the pottery, researchers found four lightly fired clay cylinders with letters that appeared to be an alphabet written on them.

A 4,400-year-old clay object discovered in the ancient city of Umm El Mara in Syria. Image credit: Glenn Schwartz, Johns Hopkins University.

“The cylinder had a hole in it, so we think it may have a string attached to another object that acts as a label,” Schwartz said.

“Perhaps there are details about what's inside the ship, or where it came from or who it belongs to.”

“We have no way to translate the text, so we can only guess.”

Scientists used carbon-14 dating techniques to confirm the age of the graves, artifacts and writings.

“Until now, scholars thought the alphabet was invented in or around Egypt sometime after 1900 BC,” Professor Schwartz said.

“But our artifacts are older and come from a different region on the map, suggesting the alphabet may have an entirely different origin story than we thought.” I am.”

Professor Schwartz presented the results of this research at a lecture today. 2024 American Society for Overseas Research (ASOR 2024) annual general meeting.

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Glenn M. Schwartz. An example of early alphabetic writing from Umm el-Mara, Syria, 24th century BC. ASOR 2024

Source: www.sci.news

Astronomers Uncover the Newest Transiting Exoplanet

Astronomers have discovered a transiting exoplanet, named IRAS 04125+2902b, orbiting a 3 million-year-old, 0.7 solar mass protostar in the Taurus Molecular Cloud.

Artistic interpretation of the IRAS 04125+2902 system. Image credit: NASA / JPL-Caltech / R. Hurt & K. Miller, Caltech & IPAC.

The radius of IRAS 04125+2902b is 0.96 the radius of Jupiter, and the mass is

This giant exoplanet, also known as TIDYE-1b, orbits its parent star. IRAS 04125+2902once every 8.83 days.

The system is located approximately 522 light-years away in the constellation Taurus.

it is part of Taurus Molecular Cloudan active star nursery with hundreds of newborn stars.

“IRAS 04125+2902b casts doubt on previous theories about the rate of planet formation,” said astronomer Madison Barber of the University of North Carolina at Chapel Hill and colleagues.

“While Earth took 10 to 20 million years to form, this exoplanet emerged in just 3 million years and orbits its star almost every week.”

“When we discover planets like this, we can look back into the past and get a glimpse of how planets formed.”

First detected by NASA's Transiting Exoplanet Survey Satellite (TESS), IRAS 04125+2902b is the newest known transiting planet.

The discovery sheds light on potential differences between our solar system and planetary systems that host nearby giant planets, such as IRAS 04125+2902b, and provides greater context about our own cosmic neighborhood. We provide.

Additionally, because the planet is still within a disk of nascent material, scientists will be able to study its formation up close, opening up new avenues of research.

Follow-up research will analyze how the planet's atmosphere compares to the surrounding disk material, providing clues about its journey into a compressed orbit.

Astronomers will also investigate whether IRAS 04125+2902b is still growing through accretion of material, or whether it may have lost its upper atmosphere to its host star.

“Planets typically form from flat disks of dust and gas, which is why the planets in our solar system are arranged in a 'pancake-flat' arrangement,” says the Young World Institute's said lead researcher and astronomer Dr. Andrew Mann. University of North Carolina at Chapel Hill.

“But here the disk is tilted and out of alignment with both the planet and its star. This is a surprising twist that calls into question our current understanding of how planets form.”

This finding is reported in the following article: paper Published in today's magazine nature.

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MG Barber others. 2024. A giant planet passing through a 3 million meter protostar with a misaligned disk. nature 635, 574-577; doi: 10.1038/s41586-024-08123-3

Source: www.sci.news

Gamers Uncover Traits of Human Gut Microbiota

Scientific research revolves around solving complex problems, and so do computer games. In 2008, a group of scientists developed the first video game that allows non-scientists to aid research by solving puzzles based on real scientific data. That’s what they called the game foldit.

Since then, other scientists have developed similar games and contributed to fields such as genetics and physics. These games are collectively called: citizen science games Or CSG. Traditionally, researchers designed CSG games to focus on science elements rather than game elements. However, they report that this approach limits user engagement and primarily appeals to participants who already have a strong interest in science.

To overcome this challenge, a group of researchers from Switzerland, Canada, and the United States developed a CSG using game-first design principles. This means that they prioritized the entertainment aspect of the game before incorporating any scientific questions into it. They used this approach in their next game. borderlands science or BLS. The scientific objective of this game is to help researchers analyze the genome sequences of one million microorganisms from the human digestive system to understand their relationships and functions in human health. Scientifically, the analysis that the player was assisting with is called: Multiple sequence alignment.

The researchers used 953,000 sequenced fragments of genetic material called . 16S rRNA From human stool samples provided by participants. american gut project. These fragments are part of specific regions within the genome that are used to identify and compare different microorganisms. They first grouped the sequences into over 10,000 clusters, then removed outliers, and finally focused on a final set of 9,667 clusters for the game.

They designed puzzles for the BLS game based on sequences within these clusters. Players saw a grid of colorful bricks, each representing a DNA base such as A, T, C, or G. Their goal was to insert gaps between bricks based on unique patterns to improve matching and alignment of different colors and arrangements. – Matching skills used by humans when playing the game. Players had a limited number of moves, each level of the game had a score to clear before moving on to the next level, and players were challenged to find the best placement with as few moves as possible.

The researchers explained that they were not recruiting people to play the game. Instead, they released the game through an existing commercial video game called Borderlands 3. They noted that the game was released in 2020 and the data reported in the paper represents the first 16 months after release.

Researchers collected over 1.4 million puzzle solutions and filtered them based on how well they were ordered and how well they matched other players' solutions to keep only the highest quality ones. Ta. They combined the filtered solutions to create a composite alignment, which they used to construct a family tree showing the evolutionary relationships among gut microbes.

The team validated the results by comparing the alignment and tree to the results of existing alignment and tree construction methods. They showed that player-generated solutions outperformed these existing methods and improved their ability to infer microbial relationships. The researchers also investigated how BLS results can help detect meaningful biological patterns from these microorganisms. relationship. They reported that the BLS alignment grouped gut microbes based on several lifestyle factors, such as diabetes and alcohol intake, that influence the host's digestive health.

Researchers reported that more than 4 million participants have completed real-world scientific tasks since the release of BLS. This is a high retention rate compared to previous CSG efforts. They proposed that this BLS performance demonstrates that scientific tasks can be embedded within video games and achieve high levels of player engagement.

Additionally, the researchers sought feedback from players as part of the game's quality assurance. Players cited curiosity about science as the most common reason for participating. The team argued that a game-first design approach to developing citizen science games like BLS has benefits, including increasing scientific literacy among the public.

The researchers reported that BLS outperformed traditional sequence alignment methods in terms of scientific output without compromising data integrity. They concluded that the results showed that video games can provide the human resources needed to analyze vast amounts of genomic data that would otherwise be completed by small teams of scientists. Ta.


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Source: sciworthy.com

Archeologists uncover ancient Mayan saltworks in Belize

Jayi Na is an underwater archaeological site dating back to the early Classic Maya period (250-600 AD) that focused on the production of salt for local use, or perhaps local production for downstream trade. I was there.



A curved-walled bowl from an underwater survey at J-E-Na, Belize. Image credit: H. MacKillop.

The Mayan diet focused primarily on corn, beans, squash, and other plant foods lacking in salt, and individual meals were supplemented with manufactured salt.

Field research at Payne’s Creek Salt Works in southern Belize shows that coastal Maya households produced surplus salt during the Classic period (250-900 CE) and built dedicated salt kitchens and separate dwellings. It turned out that it was under construction.

Professor Heather McKillop and Dr. Elizabeth Sills from Louisiana State University said: “Most of the salt works along the coast of Belize date back to the Late Classic period (AD 650-800), which corresponds to the period of population growth in the southern Maya lowlands.” said. Graduated from the University of Texas.

“These include the Northern River Lagoon, Wits Ca Aquar, Marco Gonzalez Salt Works, and others at Ambergris Cay, Moho Cay, Corson Point, Placencia Lagoon, and Paynes Creek Salt Works. Includes location.

“Large-scale salt production appears to have ended by the late Classic period (800-900 CE), and perhaps even earlier at Marco Gonzalez, when much of the southern Maya lowland abandoned, and there was a marked increase in trade around the peninsula, including exotic pottery such as fine orange, plumbate, Yucatan slate, and other pottery, particularly evident from Marco Gonzalez and Wild Cane Cay.

In 2023, archaeologists discovered the ruins of a new saltworks called J.E.N., but strangely, while it lacked the broken pots commonly found in other saltworks, it did contain some pottery. fragments were found.

“These were similar to fragments from an island site near Wild Cane Cay that I had previously excavated,” Professor McKillop said.

“So I suggested to Dr. Sills that he re-examine the remains of the J.E.N. pillars and underwater artifacts.”

The artifacts the researchers found contrasted with those from other nearby underwater sites, which included imported pottery, obsidian, and high-quality chert or flint.

“At first, I was confused by this. However, radiocarbon dating of the post discovered at J.I.N. revealed an early classical date of 250 to 600 A.D., and the mystery was solved.” Professor MacKillop said.

It turns out that J-E-Na is much older than other underwater ruins.

Through the findings, the scientists learned that J.E.N. developed as a local enterprise, without the connections to external trade that developed in the Late Classic period. At the time, the inland Maya population was at its peak in demand for salt, a basic biological element. Inland cities are running out of essential goods.

J.E.N.A. began as a small salt works through connections with the nearby community of Wild Cane Cay, which also produced salt in the early Classic period.

The abundance of fish bones preserved in the anaerobic deposits of Wild Cane Cay suggests that salt was made there to salt fish for later consumption or trade.

“Characteristic large bowls with curved walls and necked urns with fluted spouts were associated with early classical pole-and-thatched salt cookhouses, while later “Vessel supports and trade goods characteristic of salt-making sites were absent,” the authors write.

“These anthropogenic differences allow us to account for technological changes in coastal salt production and expansion of trade networks due to increased demand for inland salt during the Late Classic.”

“Despite the challenges of archeology at shallow underwater sites, research at J.E.N.A. shows that preserved wooden structures can be accurately dated and traced back to ancient commodity production (in this case salt) practices. This highlights the value of excavations in sub-seafloor mangrove peat providing context.”

of findings appear in the diary ancient.

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Heather McKillop and E. Corey Sills. The earliest ancient Mayan salt production in southern Belize: excavations at J.E.N. ancientpublished on November 6, 2024. doi: 10.15184/aqy.2024.186

Source: www.sci.news

Uncover Your True Biological Age with This Straightforward Balance Test

When it comes to balancing on one foot, it may seem like a simple task, but it could actually indicate more than you think. Recent research suggests that struggles with balance could be a sign of accelerated aging in the body.

Scientists at the Mayo Clinic in Minnesota have discovered that the ability to balance on one leg can reveal the rate of aging in the neuromuscular sensory system, particularly in older individuals.

This sensory system, comprised of nerves connecting muscles to the brain and spinal cord, plays a crucial role in facilitating movement. Its decline with age can lead to slower reflexes and movements.


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“Balancing on one leg involves various physiological components like leg strength, postural stability muscles, neuromuscular coordination, and sensory information, all of which tend to decrease with age,” explained Professor David Proctor, an aging and exercise expert at Pennsylvania State University in the US. This information was reported by BBC Science Focus.

Preventing or slowing down the decline in strength and balance as we age can significantly impact one’s ability to stay functionally independent in the long term.

The study involved 40 participants aged between 50 and 80, who were assessed on their ability to balance on one leg. Despite similar height, weight, and activity levels, age was the only differing factor among the participants.

Each participant performed four 30-second balances with eyes closed and eyes open for both legs. The researchers recorded the duration of balance maintained within each 30-second interval to evaluate the impact of age on balance.

The results indicated a direct correlation between age and trembling, with a 6.3% increase in tremors with eyes open and a 10.5% increase with eyes closed for every decade of age. Additionally, the time spent balancing decreased by 2.2 seconds per decade on the non-dominant leg and 1.7 seconds on the dominant leg.

This suggests that balance duration is a valid marker of aging and a potential indicator of fall risk in older adults.

Although balancing for 30 seconds may not require significant muscle strength, it heavily relies on good neuromuscular control, which diminishes with age, leading to increased sway and reduced balancing time.

Fortunately, research highlights the benefits of balance and aerobic exercises like swimming, running, and cycling in preventing age-related decline in balance and muscle control.

About our experts

Dr. David Proctor, a professor at Pennsylvania State University, USA, specializes in kinesiology, physiology, and medicine. His research has been featured in various scientific journals.

read more:

Source: www.sciencefocus.com

Archaeologists Uncover Ancient Roman Forum in Spain

Archaeologists from the University of Granada have announced the discovery of the remains of an ancient Roman forum in Ubrique, Spain’s Andalusia region.

Ruins of Ubrique, Andalusia, Spain. Image credit: University of Granada.

“The main purpose of the excavations was to confirm the hypothesis proposed by local scholar Juan Vegaso at the end of the 18th century that the central terrace of the hill, known as Cerro de la Mora, was the site of a Roman forum. City”, University of Granada. Professor Macarena Bustamante Alvarez her colleagues said in a statement.

At the site, archaeologists unearthed what appears to be a wall surrounding the central plaza, about 1 meter (3.3 feet) high and 16 meters (52.5 feet) long.

They also discovered a series of architectural elements indicating large, clearly public buildings dating back to Roman times.

“We confirmed the presence of a monumental altar with decorative architectural remains,” the archaeologists said.

“These include the bases and axes of columns, as well as other evidence of statue plinths and column remains scattered throughout the city.”

“We were also able to re-examine some of the buildings at the site and outline an area that shows Roman religious practices, especially those related to water.”

Ruins of an ancient Roman forum in Ubrique, Andalusia, Spain. Image credit: University of Granada.

According to researchers, the ruins continued to be inhabited until the end of the 4th century AD.

“This is confirmed by coins found in the area, one of which bears a christogram, the first example of Christian iconography found at the site,” they said. Ta.

“Additionally, North African pottery allowed us to extend the period of occupation of this site, which was previously thought to last until the third century AD.

“It also helped us understand the trade routes that are closely connected to the Campo de Gibraltar region.”

In addition, scientists have unearthed the possible basis of a medieval defensive structure.

“This building would have provided a visual link between this site and other surrounding fortifications that would have been used to monitor this mountainous area of Cadiz,” they said. Ta.

“This excavation provides an overview of a space important for understanding the arrival and settlement of the Romans in the southern Iberian Peninsula and their intermixture with communities already settled in the area.”

Source: www.sci.news

Marine scientists uncover unique new deep-sea skater species

Marine biologists identify new species of skate Leucolaja It lurks in the deep waters of the southwestern Indian Ocean.

brown long nose skates (Leucolaya longirostris), holotype of an adult male viewed from the dorsal side. Scale bar – 5 cm. Image credit: Weigman others., doi: 10.3390/biology13060405.

members of the genus Leucolaja A small to medium sized skate, usually with a short, obtuse snout.

To date, 14 valid species of this genus have been identified, primarily in the Atlantic Ocean, but also in the Indian Ocean.

“The 14 species currently described are Leucolaja It reaches a maximum size of 30-120 cm and is found in the Indian and Atlantic oceans. ” Dr Simon Weigman by the Leibniz Institute for Biodiversity Change Analysis and colleagues.

“Of these 12 species, Leucolaja Compagnoi and Leucolaja wallasei They also live outside the Atlantic Ocean, in continental waters in the southwestern Indian Ocean. ”

The newly discovered Leucolaja This species is the fourth known species of this genus from the western Indian Ocean.

named Leucolaya longirostris (common name is Brown Longnose Skate), apparently endemic to the Madagascar Ridge in Walters Shoals.

“In the 1970s and 1980s, researchers working on the Madagascar Ridge, a raised area of ​​the ocean floor in the southwestern Indian Ocean, collected a total of eight rare skate specimens at depths of 750 to 1,050 meters.” biologists said.

“Despite the long snout, this specimen could definitely be assigned to the genus. Leucolaja This is due to the typical characteristics of claspers. ”

“It can be easily distinguished from all 14 congeners by its long, sharply pointed snout,” the researchers said.

“Furthermore, it appears to occur only on the Madagascar Ridge, away from the known distribution areas of all congeners, and its clasper morphology exhibits several unique aspects.”

brown long nose skates (Leucolaya longirostris), holotype of an adult male viewed from the ventral side. Scale bar – 5 cm. Image credit: Weigman others., doi: 10.3390/biology13060405.

Leucolaya longirostris These are medium-sized skates with a total length of 71.1 cm or more.

Males mature at about 60 cm. The largest known female is 70cm long. The smallest known specimen is a young female with a total length of 27.6 cm.

recognition of Leucolaya longirostris Provide new insights into morphological variation within the genus Leucolaja “This constitutes a very unusual and noteworthy addition to this genus Sketchi,” the researchers said.

“Nevertheless, the very limited distribution of this new species raises concerns about its ability to sustain fisheries, and it may be susceptible to capture in longline fisheries, particularly deep-sea trawl fisheries.”

“Although little information is available about fisheries operating in the region of the Madagascar Ridge, this deep-sea skate tolerates intensive fishing pressure, potentially due to its slow-life history characteristics and low productivity. You may not be able to.”

“Walter's Shoal has had good catches in the past and this pressure may return in the future,” they added.

“As a fishery targeting orange roughy (Hoplostessus atlanticus) and Kinmedai (Belix Decactylus) have typically used mesophoric trawls on the ocean floor, but new species may have benthic refugia. ”

“However, further research is needed to investigate its distribution, life history, population size and trends, and threats.”

“This is essential to improving data collection and research and making more effective conservation and management policy decisions.”

a paper Report findings published in journals biology.

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Simon Weigman others. 2024. Description of a noteworthy new type of skate shoe Leucolaja Malm of the southwestern Indian Ocean, 1877 (Radidae, Radidae): Introducing 3D modeling as an innovative tool for visualization of clasper characters. biology 13 (6): 405;doi: 10.3390/Biology 13060405

Source: www.sci.news

Scientists uncover enigmatic subduction zone beneath Pacific Ocean

According to a team of geoscientists from the University of Maryland and the University of Maryland, between 250 million and 120 million years ago during the Mesozoic Era, the ancient ocean floor was formed by the East Pacific Rise, a plate boundary at the bottom of the southeastern Pacific Ocean. It is said to have sunk deep into the earth. University of Alberta.



A map of the East Pacific Ridge region where the ancient ocean floor was discovered. Image credit: Jingchuan Wang.

University of Maryland researcher Jingchuan Wang and his colleagues used innovative seismic imaging techniques to look deep into the Earth's mantle, the layer between the Earth's crust and core.

They discovered an unusually thick region in the mantle transition zone at depths of about 410 to 660 km below the Earth's surface.

This zone separates the upper and lower mantle and expands or contracts depending on temperature.

The newly discovered ocean floor may also explain the unusual structure of the Pacific Large Low Shear Velocity Province (LLSVP), a huge region in Earth's lower mantle. Because LLSVP appears to be divided by slabs.

“This thickened area is like a fossil fingerprint of an ancient ocean floor that sank into the Earth about 250 million years ago,” Wang said.

“This gives us a glimpse into Earth's past that we've never seen before.”

Subduction occurs when one tectonic plate slides beneath another and surface material is recycled into the Earth's mantle.

This process often leaves behind visible evidence of movement, such as volcanoes, earthquakes, and deep ocean trenches.

Geologists, on the other hand, typically study subduction by examining rock samples and sediments found at the Earth's surface.

By studying how seismic waves travel through the different layers of the Earth, researchers were able to create a detailed map of the structures hidden deep within the mantle.

“You can think of seismic imaging as similar to a CT scan. Essentially, it allows us to see a cross-section of the Earth's interior,” Dr. Wang said. .

“Typically, chunks of ocean material are completely consumed by the Earth, leaving no discernible traces on the surface.”

“But looking at ancient subducted slabs through this perspective has provided new insights into the relationship between the Earth's very deep structures and surface geology that were not previously clear.”

What the authors discovered surprised them. Matter was moving much more slowly through the Earth's interior than previously thought.

The unusual thickness of this region they found suggests the presence of cold material in this part of the mantle transition zone, where parts of the oceanic slab become stuck in the middle as they sink through the mantle. It suggests that there is.

“We found that material is sinking at about half the rate expected in this region. This may be due to the mantle transition zone acting like a barrier, slowing the movement of material through the Earth. “This suggests something,” Dr. Wang said.

“Our findings raise new questions about how the deep Earth influences what we see at the surface over vast distances and time scales.”

of result Published in a magazine scientific progress.

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Wang Jingchuan others. 2024. Intraoceanic subduction during the Mesozoic era formed the lower mantle beneath the East Pacific uplift. scientific progress 10(39);doi: 10.1126/sciadv.ado1219

Source: www.sci.news

Researchers uncover natural graphene flakes in lunar soil samples

Planetary scientists have identified layers of graphene formed alongside complex minerals in lunar regolith samples collected by China's Chang'e-5 probe, a discovery that provides new insight into the origins of the Moon and supports the hypothesis that it contains carbon.

Structural and compositional characteristics of few-layer graphene in lunar soil samples from Chang'e-5. Image courtesy of Zhang others., doi: 10.1093/nsr/nwae211.

“Graphene's novel physical phenomena and extraordinary properties have revolutionized research in condensed matter physics and materials science,” said Professor Zhang Wei of Jilin University and his colleagues.

“It plays an increasingly important role in a wide range of fields, including planetary and space sciences.”

“It is estimated that about 1.9% of all interstellar carbon exists in the form of graphene, and protosolar graphene has been identified in carbonaceous chondrite meteorites.”

The researchers analyzed an olive-shaped lunar soil sample measuring about 2.9 millimeters by 1.6 millimeters, collected by the Chang'e-5 mission in 2020.

Using a specialised spectrometer, they discovered iron compounds in the carbon-rich parts of the sample that are closely related to the formation of graphene.

The researchers then used advanced microscopy and mapping techniques to determine that the carbon content within their samples was made up of “flakes” of two to seven layers of graphene.

The scientists propose that few layers of graphene could have formed during volcanic activity in the Moon's early existence, catalysed by solar wind stirring up the lunar soil and iron-containing minerals, prompting a change in the structure of carbon atoms.

Meteorite impacts creating high temperature and pressure environments may also have led to the formation of graphene.

“The first study to confirm the presence of native few-layer graphene in lunar soil samples by examining its microstructure and composition,” the authors said.

“Our discovery provides new insight into the origin of the Moon and supports the hypothesis that the Moon contains carbon.”

“Moreover, graphene's unusual properties depend strongly on its structure and environment.”

“Further investigation of the properties of natural graphene could provide more information about the geological evolution of the Moon.”

“Consequently, the formation of natural graphene by mineral catalysis sheds light on the development of low-cost, scalable synthesis techniques for high-quality graphene.”

“This will therefore propel a new lunar exploration program forward, with some exciting breakthroughs in the future.”

of Investigation result Published in the journal National Science Review.

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Zhang Wei othersNatural few-layer graphene discovered on the moon. National Science ReviewPublished online June 17, 2024; doi: 10.1093/nsr/nwae211

Source: www.sci.news

Astronomy techniques employed by scientists to uncover deepfakes

According to a team of astronomers from the University of Hull, spotting a deepfake is as simple as looking for stars in the eyes. They propose that AI-generated fakes can be identified by examining human eyes in a similar manner to studying photos of galaxies. This means that if the reflections in a person’s eye match, then the image is likely of a real human. If not, it is likely a deepfake.



In this image, the person on the left (Scarlett Johansson) is real and the one on the right is generated by AI. Below their faces are painted eyeballs. The reflections in the eyeballs match in the real person but are inaccurate (from a physical standpoint) in the fake one. Image credit: Adejumoke Owolabi / CC BY 4.0.

“The eye reflections match up for real people but are incorrect (from a physics standpoint) for fake people,” said Prof Kevin Pimblett, from the University of Hull.

Professor Pimblett and his colleagues analysed the light reflections of the human eye in real and AI-generated images.

They then quantified the reflections using a method commonly used in astronomy to check for consistency between the reflections in the left and right eyes.

In fake images, the reflections in both eyes are often inconsistent, while in real images the reflections in both eyes are usually the same.

“To measure the shape of a galaxy we analyse whether it has a compact centre, whether it has symmetry and how smooth it is – we analyse the distribution of light,” Professor Pimblett said.

“We automatically detect the reflections and run their morphological features through CAS (density, asymmetry, smoothness) Gini Coefficient. This is to compare the similarities between the left and right eyeballs.”

“Our findings suggest that there are some differences between the two types of deepfakes.”

The Gini coefficient is typically used to measure how light in an image of a galaxy is distributed from pixel to pixel.

This measurement is done by ordering the pixels that make up an image of a galaxy in order of increasing flux, and comparing the result with what would be expected from a perfectly uniform flux distribution.

A Gini value of 0 is a galaxy whose light is evenly distributed across all pixels in the image, and a Gini value of 1 is a galaxy whose light is all concentrated in one pixel.

The astronomers also tested the CAS parameter, a tool originally developed by astronomers to measure the distribution of a galaxy’s light to determine its morphology, but found it to be useless for predicting false eyes.

“It’s important to note that this is not a silver bullet for detecting fake images,” Professor Pimblett said.

“There are false positives and false negatives, and it doesn’t detect everything.”

“But this method provides a foundation, a plan of attack, in the arms race to detect deepfakes.”

The researchers Their Work July 15 Royal Astronomical Society National Astronomy Meeting 2024 (NAM 2024) At the University of Hull.

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Kevin Pimblett othersDetecting deepfakes using astronomy techniques. 2024

Source: www.sci.news

Experiments in Basic Physics Could Uncover Hidden Dark Matter in Additional Dimensions

We don’t tend to dwell on the fact that we exist in three dimensions. Front to back, left to right, up to down – these are the axes along which we move through the world. When we try to imagine something else, we usually conjure up the most outlandish science fiction images of portals in the fabric of space-time and parallel universes.

But serious physicists have long been fascinated by the possibility of extra dimensions. Despite their intangibility, extra dimensions hold the promise of solving some big questions about the deepest workings of the universe. And just because they’re hard to imagine and even harder to observe doesn’t mean we can rule them out. “There’s no reason they have to be three-dimensional,” says David Schneider, a physics professor at the University of California, San Diego. Georges Obie At Oxford University. “It could have been two, it could have been four, it could have been ten.”

Still, there comes a time when any self-respecting physicist wants hard evidence. That’s why it’s so exciting that over the past few years, researchers have developed several techniques that may finally provide evidence of extra dimensions. For example, we might be able to detect gravity leaking into extra dimensions. We might see subtle signatures of it in black holes, or we might find its signature in particle accelerators.

But now, in an unexpected twist, Ovid and his colleagues claim that there is an extra dimension that is fundamentally different from any previously conceived. This “dark dimension” hides ancient particles whose gravity could solve the mystery of dark matter, the force that is thought to have shaped the universe. Crucially, this dimension is relatively…

Source: www.newscientist.com

Paleontologists Uncover Secrets of ‘Elgin Marvel’ Fossil

The “Elgin Marvel” fossil is a block of reddish sandstone containing a natural cast of a Permian skull and jaw. Dicynodonts It was discovered in the Hopeman Sandstone Formation near Elgin, Scotland. According to a new study, the specimen Gordonia traquairi A type of dicynodont that lived between 254 and 252 million years ago, when the Earth was made up of a single land mass called Pangaea.

Artist image Gordonia traquairi Image courtesy of Scott Reed.

Gordonia traquairi It belongs to a group of extinct species known as dicynodonts, and is characterized by its stocky body, beak, and tusks.

This organism lived relatively shortly before the end-Permian extinction (the Great Dying), the worst mass extinction event in history, which occurred about 252 million years ago and wiped out much of life on Earth.

The Elgin Marvel specimen is one of the best-preserved in a series of fossils collected near Elgin in northeast Scotland.

These are collectively known as the Elgin reptiles. Gordonia traquairi are closely related to mammals.

In the new study, paleontologist Heidi George of the University of Edinburgh and her colleagues performed micro-CT scans of the cavities the animal carved into the sandstone before the bones deteriorated.

The scan produces a three-dimensional representation of the skull anatomy, including details of the brain.

These insights help us understand animal behavior and the biology behind it, providing clues about the evolution of this and other species.

Gordonia traquairi The fossil shares many physical characteristics with similar remains found in China, indicating that dicynodonts were diversifying around the world just before the devastating extinction.

The Elgin reptile is the only known example of this type of fossil from Western Europe.

Palaeontologists hope that the increasing use of micro-CT scanning as a tool to study fossils in detail, combined with the trend toward open sharing of data, will provide opportunities to add to the body of knowledge in the field.

“The Elgin Marvel is a fascinating fossil of an ancient mammal relative that is one of the best-preserved of the world-famous Elgin reptiles,” Dr. George said.

“Most of these famous fossils were discovered more than a century ago, but it’s only recently that new techniques have revealed more detail and provided valuable insights into their skull and brain anatomy and lineage.”

“It’s hard to imagine, but about 250 million years ago Scotland was a desert covered with sand dunes. Gordonia “God was in control of the world,” says Professor Steve Brusatte of the University of Edinburgh.

“By studying them, we can learn about some of the earliest stages of our own evolution.”

This study paper In Zoological Journal of the Linnean Society.

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Heidi George others Micro-CT data reveal new information about the craniomandibular and neuroanatomy of dicynodonts. Gordonia (Therapsid: Heterodontida) Lived in the Late Permian of Scotland. Zoological Journal of the Linnean Society Published online June 18, 2024; doi: 10.1093/zoolinnean/zlae065

Source: www.sci.news

Medical records of astronauts uncover health risks of space travel

Astronauts Robert L. Curbeam Jr. (left) and Christer Fugelsang aboard the International Space Station

National Aeronautics and Space Administration (NASA)

How spaceflight affects astronauts' health may be better understood thanks to the creation of the first “space-omics” biobank, a collection of thousands of blood and tissue samples and medical information taken on multiple space missions.

These include missions to the International Space Station as well as SpaceX's Inspiration 4, the first private spaceflight to send four non-government-trained astronauts into space for three days in 2021.

The resource, called the Space Omics and Medical Atlas (SOMA), contains detailed medical data, collectively known as biomarkers, such as DNA damage and changes in people's gene activity and immune system function.

Space flight is known to pose certain health risks. For example, astronauts experience reduced bone density and muscle mass due to weightlessness, and high levels of radiation in space can damage cells and DNA, causing a variety of health effects on the body. Astronauts are more likely to develop heart disease Later years and Some people have experienced a decrease in vision After going into space.

By consistently collecting astronauts' medical data through the SOMA biobank, researchers may be able to better understand these changes and develop ways to mitigate them, the researchers say. Christopher Mason He is a professor at Weill Cornell Medicine in New York and helped establish the biobank.

“Biomarkers don't necessarily translate into anything clinically meaningful, but they're a good way to understand how this unique environment is affecting us.” Damien Bailey The researchers are from the University of South Wales in the UK, but were not involved in the study.

One of the findings from the Inspiration 4 mission was that although astronauts experienced changes in numerous biomarkers, most measurements returned to normal within a few months of returning to Earth.

This suggests that sending private citizens into space poses no greater health risks than sending professional astronauts, Mason said. “Instead of training them for decades, we can start opening up space to more people.”

Results from Inspiration 4, which had two men and two women on board, also suggested that changes in gene activity returned to normal more quickly in women. This may be because women's bodies have to be able to cope with the possibility of pregnancy, Mason says. “Being able to withstand big changes in physiology and fluid dynamics could be great for managing pregnancy, but it could also help manage the stresses of spaceflight.”

Timothy Etheridge A researcher from the University of Exeter in the UK says it would be beneficial to have a common resource that researchers around the world can use. “We need a consistent approach to collecting samples,” he says.

Thomas Smith The researcher, from King's College London, says understanding the health effects of spaceflight will become even more important if longer-term missions take place, such as trips to Mars. “Anything that leads to longer-term missions makes it even more important to know what's going on and, ideally, to be able to address it,” he says.

topic:

Source: www.newscientist.com

Archaeologists uncover ancient human occupation of Saudi Arabia’s lava tube caves spanning 7,000 years

New archaeological excavations show that the Umm Jirsan lava tubes in Halat Khyber, northwestern Saudi Arabia, have been repeatedly visited by humans from at least the Neolithic period to the Chalcolithic/Bronze Age (10,000 to 3,500 years ago). The stage of residence has become clear.

Photos of Umm Jilsan Cave and its interior.Image credit: Stewart other., doi: 10.1371/journal.pone.0299292.

Intensified field research in northern Arabia over the past decade has highlighted the richness and diversity of the region's archaeological and paleontological record.

Human settlement in northern Arabia during the Pleistocene appeared to be sporadic and associated with periods of improved climate, but by the Holocene people had settled in the area more consistently through dry periods. I was able to.

“Our discoveries at Umm Jilsan provide a rare glimpse into the lives of the ancient peoples of Arabia, revealing repeated stages of human occupation and the pastoralism that once flourished here. It sheds light on people's activities,” said Griffith archaeologist Dr Matthew Stewart. University and the Max Planck Institute for Geoanthropology.

“This site probably served as an important transit point along pastoral routes, linking major oases and facilitating cultural exchange and trade.”

Rock art and animal records attest to the pastoral use of Umm Jilsan and the surrounding area, providing a vivid picture of an ancient way of life.

Depictions of cows, sheep, goats, and dogs confirm prehistoric livestock practices and herd composition in the area.

Isotope analysis of animal remains collected from lava tubes shows that livestock primarily grazed wildflowers and shrubs, while humans maintained a protein-rich diet and increased their consumption of C3 plants over time. has increased significantly, suggesting the emergence of oasis agriculture.

Professor Michael Petraglia, an archaeologist from Griffith University, the University of Queensland, and the Smithsonian Institution, said: “Subterranean localities are of global importance in archeology and Quaternary science, but our research is the first of its kind in Saudi Arabia. “This is the first comprehensive study.”

This discovery highlights the immense potential of interdisciplinary research in caves and lava tubes, providing a unique window into Arabia's ancient past.

“Umm Jilsan was probably not a permanent settlement, but a valuable transit point for people traveling between oasis settlements,” the authors said.

“Lava tubes and other natural shelters are valuable resources for communities surviving in difficult environments, and further research shows that they are important archaeological sources of information about the history of human occupation in Arabia. ”

“Our research into Arabia's hidden past uncovers thousands of years of human habitation in and around the Umm Jirsan lava tubes, revealing ancient lifestyles and environmental changes in this harsh desert environment. shed light on the adaptation of

team's paper Published in an online journal PLoS ONE.

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M. Stewart other. 2024. First evidence of human occupation of Arabia's lava tubes: Archeology of Umm Jirsan Cave and Surroundings, Northern Saudi Arabia. PLoS ONE 19 (4): e0299292; doi: 10.1371/journal.pone.0299292

Source: www.sci.news

Researchers uncover the secrets behind Pluto’s peculiar pear shape

Pluto's surface is dominated by Sputnik Planitia, a giant pear-shaped basin. Although it appears to be of impact origin, modeling has not yet accounted for its unique shape. Planetary scientists at the University of Bern have proposed an impact mechanism that would both recreate the topography of the basin and explain the alignment around the Pluto-Charon axis. According to their research, Sputnik Planum was created by a collision between Pluto and a planet about 700 km (435 miles) in diameter.



This mosaic of Pluto was created from the New Horizons LORRI image taken on July 14, 2015 from a distance of 49,700 miles (80,000 km). This view is projected from 1,118 miles (1,800 km) above Pluto's equator, from northeast over the dark, cratered Cthulhu region to a bright, smooth, icy plain called Sputnik Planum. I am. Pluto's north pole is off the left side of the image. This mosaic was created using panchromatic imagery from the New Horizons LORRI camera, with color overlaid from New Horizons' built-in Ralph color mapper. Image credit: SA Stern other.

In 2015, NASA's New Horizons spacecraft revealed that Pluto's surface is geologically complex.

The region is dominated by a 1,200 x 2,000 km (746 x 1,243 mi) nitrogen ice-filled basin called Sputnik Planitia.

Sputnik Planitia is located in the western part of Pluto's Tombow region, a famous heart-shaped structure.

This basin is 3 to 4 km (1.9 to 2.5 miles) lower in elevation than most of the dwarf planet's surface.

“Sputnik Planitia's bright appearance is due to the fact that it is filled with mainly white nitrogen ice, which moves and convects to constantly smooth the surface,” said Dr. Harry Ballantyne, a planetary scientist at the University of Bern. Ta.

“Due to the low altitude, this nitrogen likely accumulated quickly after the impact.”

“The eastern part of the 'heart' is also covered with a similar but much thinner layer of nitrogen ice, the origin of which is not yet clear to scientists, but is probably related to Sputnik Planum.”

“The elongated shape of Sputnik Planitia strongly suggests that the impact was an oblique impact rather than a direct head-on impact,” said Dr. Martin Jutzi, a planetary scientist at the University of Bern.



This high-resolution image of Pluto was taken by New Horizons on July 14. Pluto's surface boasts an astonishing range of subtle colors, highlighted in this view by a rainbow of pale blues, yellows, oranges, and deep reds. Many landforms have unique colors that tell complex geological and climatological stories that scientists are only beginning to decipher. Image credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute.

The authors used smoothed particle hydrodynamics (SPH) simulation software to digitally recreate such collisions while varying both the composition of Pluto and its impactors, as well as the speed and angle of the impactors. did.

These simulations confirmed our suspicions about the oblique angle of the impact and determined the configuration of the impactor.

“Pluto's core is so cold that the rocks remain very hard and do not melt despite the heat of the impact, and the angle and low speed of the impact prevents the impactor's core from sinking into Pluto's core, leaving it intact. “It's like a splatter,” Dr. Ballantyne said.

Dr. Eric Asfaug, a planetary scientist at the University of Arizona, added: “Somewhere beneath Sputnik are the remains of the core of another giant object that Pluto was not able to fully digest.”

“The strength and relatively low velocity of this core were the keys to the success of these simulations. At low strengths, the highly symmetrical remnants look nothing like the teardrop shape observed on New Horizons. surface features are obtained.

“We're used to thinking of planetary collisions as incredibly violent events, and we can ignore the details except for things like energy, momentum, and density.”

“But in distant solar systems the velocities are very slow and the solid ice is strong, so the calculations need to be more accurate. That's where the fun begins.”

The research team's findings also shed new light on Pluto's internal structure.

“In fact, a giant impact like the one simulated is much more likely to have occurred very early in Pluto's history,” the researchers said.

“But this poses a problem: giant depressions like Sputnik Planitia are expected by the laws of physics to move slowly towards the dwarf planet's poles over time because of the lack of mass. ” But paradoxically, it is close to the equator. ”

“A previous theoretical explanation was that Pluto, like several other planetary bodies in the outer solar system, has an ocean of liquid water underground.”

“Previous explanations suggest that Pluto's icy crust thins in the Sputnik Planum region, where the oceans swell and liquid water is denser than ice, creating a mass surplus that triggers a shift toward the equator. It will be.”

“But new research offers a different perspective.”

“In our simulations, all of Pluto's primordial mantle is excavated by the collisions, and as the impactor's nuclear material splatters into Pluto's core, it creates a localized overmass that causes the absence of a subsurface ocean. Or, at best, it could be explained as moving toward the equator without the ocean being present, “very thin,'' Dr. Yutzi said.

“This novel and original origin of Pluto's heart-shaped feature may lead to a deeper understanding of Pluto's origins,” said Dr. Adeen Denton, a planetary scientist at the University of Arizona.

of result It was published in the magazine natural astronomy.

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HA Ballantine other. Sputnik Planum as an impact debris showing an ancient rocky mascon on oceanless Pluto. Nat Astron, published online on April 15, 2024. doi: 10.1038/s41550-024-02248-1

Source: www.sci.news

Scientists uncover five previously unknown hydrothermal vents in the Pacific Ocean

Scientists on board the research vessel atlantis Five new deep-sea hydrothermal vents have been discovered on the ocean floor at a depth of 2,550 meters (1.6 miles). All exhaust fluids are hotter than 300 degrees Celsius (570 degrees Fahrenheit).



vehicle carried by humans alvin Arrived at the ocean floor. Image credits: J. McDermott, Lehigh University / T. Barreyre, CNRS / R. Parnell-Turner, Scripps Institution of Oceanography / D. Fornari, Woods Hole Oceanographic Institution / National Deep Diving Facility / Alvin Group.

Hydrothermal vents are rich in chemicals that provide energy for animal life, fueling rich and productive ecosystems.

The location of the new hydrothermal vent was discovered by a team of scientists during a research expedition funded by the National Science Foundation.

They are located on the East Pacific Ridge near 10 degrees north latitude and are part of the trans-Earth mid-ocean ridge volcanic mountains, where two tectonic plates are breaking apart at a rate of about 11 cm (4.3 inches) per year.

Expedition researchers used underwater robots to map the area at night guard.

rear guard Retrieved each morning, high-resolution maps from the vehicle’s sensors were used to plan the day’s dives by the manned vehicle. alvinThis gives scientists a first-hand look at the complex and ever-changing environments of places like the East Pacific Rise.

“High-resolution maps are guard There is a possibility that new hydrothermal areas will be discovered soon guard will be back on deck,” said Dr. Jill McDermott, a researcher at Lehigh University.

“This gives us great goals such as: alvin And the opportunity to make multiple discoveries in one dive.”

scientists infiltrate alvin He first discovered a hydrothermal vent in 1977 while exploring an oceanic ridge north of the Galapagos Islands.

The discovery has reshaped scientists’ understanding of the conditions that can support life on Earth and elsewhere in the solar system.

“Mid-ocean ridges account for more than 75% of all volcanic activity on Earth,” said CNRS researcher Dr. Thibault Valley.

“There are thousands of these deep-sea hot springs, which together extract 10 percent of the Earth’s total internal heat.”

“We want to better understand how hydrothermal vents release heat and chemicals as they flow beneath the ocean floor, impacting global oceans.”

“new guard “Using the map, we can see vital details of lava flows erupting in the deep ocean and target them for rock sample collection, just as geologists do on land.” said Dr. Daniel Fornari, a researcher at the institute.

“These new perspectives and analysis of rock samples will help us understand how fast the lava erupted, how far it traveled, and how deep-sea lava eruptions affect hydrothermal eruptions. I guess.”

“By working together these two state-of-the-art deep-sea submersibles, we will make surprising new discoveries about how the deep sea floor is constructed in some of the harshest environments on Earth. Yes, we can,” said Dr. Ross Parnell Turner., a researcher at Scripps Institution of Oceanography.

Source: www.sci.news

Astronomers Uncover Two Ancient Substructures within the Milky Way

The newly identified structures, called Shakti and Shiva, are between 12 billion and 1 billion years old, making them so old that they are even older than the spiral arms and oldest parts of the present-day Milky Way galaxy's disk. may have been formed before.

This image shows the location and distribution of Shakti (yellow) and Shiva (blue) stars throughout the Milky Way. Image credit: ESA / Gaia / DPAC / K. Malhan.

“What's really amazing is that we can detect these ancient structures at all,” said Dr. Kati Malhan, an astronomer at the Max Planck Institute for Astronomy.

“The Milky Way has changed so much since these stars were born that we didn't expect to be able to see them so clearly as a group. But the unprecedented data obtained from ESA's Gaia satellite Thanks to you, this is possible.”

Using Gaia observations, Dr. Mulhan and Dr. Hans-Walter Rix of the Max Planck Institute for Astronomy were able to determine the orbits of individual stars in the Milky Way, as well as their content and composition.

“When we visualized the orbits of all these stars, we found that two new structures stood out from the rest among stars of certain chemical compositions. We named them Shakti and Shiva. '' said Cati.

Each stream contains the mass of about 10 million suns, and the stars, all 12 to 13 billion years old, have similar compositions and move in very similar orbits.

The way they are distributed suggests that they may have formed as separate pieces that merged with the Milky Way early in their lives.

Shakti and Shiva both lie towards the center of the Milky Way.

Gaia explored this part of the Milky Way in 2022 using a type of galactic archaeology. This indicates that this region is filled with the oldest stars in the entire galaxy, all of which were born before the Milky Way disk was properly formed.

“The stars there are so old that they lack many of the heavy metal elements that were created later in the life of the universe,” Dr. Ricks says.

“Because the stars at the center of our galaxy are metal-poor, we named this region the 'poor old heart' of the Milky Way.”

“Until now, we were only aware of very early fragments that came together to form the ancient core of the Milky Way.”

“In Shakti and Shiva we see the first works that appear to be relatively ancient but are located further out.”

“These represent the first steps in the galaxy's growth towards its current size.”

The two streams are very similar, but not identical. The star Shakti orbits a little farther from the center of the Milky Way galaxy and has a more circular orbit than the star Shiva.

Fittingly, these streams are named after the divine couple in Hindu philosophy who come together to create the universe.

About 12 billion years ago, the Milky Way was very different from the orderly spiral we see today.

They believe that our galaxy was formed by the merging of multiple long, irregular filaments of gas and dust that all formed stars and intertwined, giving rise to the galaxy as we know it. It is being

Shaki and Shiva appear to be two of these components, and future Gaia data releases may reveal more.

The authors also created a dynamic map of other known components that play a role in galaxy formation and were discovered using Gaia data.

These include Gaia-Sausage-Enceladus, LMS1/Wukong, Arjuna/Sequoia/I'itoi, and Pontus.

These groups of stars all form part of the Milky Way's complex genealogy that Gaia has been working to build over the past decade.

Dr Timo Prusti, ESA astronomer and Gaia project scientist, said: “Learning more about the early life of the Milky Way is one of Gaia's goals, and we are well on our way to achieving it.”

“To understand how our galaxy formed and evolved, we need to pinpoint subtle but crucial differences between the Milky Way's stars.”

“This requires incredibly accurate data, and now, thanks to Gaia, we have that data.”

“As we discover surprising parts of our galaxy, such as the Shiva and Shakti rivers, we are filling in the gaps and painting a complete picture not just of our current homeland, but of the earliest history of the universe.”

of study Published in astrophysical journal.

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Catty Mulhan & Hans-Walter Ricks. 2024. Shiva and Shakti: A fragment of a primordial galaxy presumed to be inside the Milky Way. APJ 964, 104; doi: 10.3847/1538-4357/ad1885

Source: www.sci.news

Plant researchers uncover answers to a 125-million-year-old genetic enigma

researchers Cold Spring Harbor Laboratory We discovered two distantly related model plants. Arabidopsis And tomatoes (Solanum lycopersicum), very different control systems can be used to control the exact same gene. Incredibly, scientists have linked this behavior to extreme genetic modifications that occurred over the course of 125 million years of evolution.

Function of CLV3 in Arabidopsis And in tomato, the cis-regulatory sequences are conserved despite extreme divergence.Image credit: Shiren other., doi: 10.1371/journal.pgen.1011174.

Cold Spring Harbor Laboratory scientist Daniel Siren and his colleagues used genome editing to create more than 70 mutant strains of tomato and Arabidopsis plants.

Due to each mutation, CLV3.

The researchers then analyzed how each mutation affected plant growth and development.

when DNA is stored CLV3 Check-in has mutated too much and the fruit has grown explosively.

CLV3 It helps in the normal development of plants,” Dr. Shiren said.

“If the switch hadn't been turned on at exactly the right time, the plant would have looked completely different.”

“None of the fruits are huge and ideal. You have to balance growth and yield.”

“If you only have two giant tomatoes on a plant, is that as beneficial as a reduced yield?”

“There are no easy solutions. When you try to improve something, you always end up sacrificing something.”

In the case of tomatoes, mutations occur near the beginning, but not at the end. CLV3 Genetics had a dramatic effect on fruit size.

for Arabidopsisthe regions surrounding both parts of the gene had to be destroyed.

This suggests that something happened over the past 125 million years that caused plants to evolve differently. What exactly happened remains a mystery.

“We can't go back to our common ancestors because they no longer exist,” Dr. Siren says.

“So it's hard to say what the original conditions were and how they were mixed together.”

“The simplest explanation is that there is a regulatory element that is conserved to some degree, and that is being changed in a subtle way. That's a little unexpected.”

“What is certain is that gene regulation is not uniform across plant species.”

“Uncovering these genetic differences could help make crop genome engineering more predictable.”

“And that would be a huge win not only for science, but also for farmers and plant breeders around the world.”

of study Published in a magazine PLoS Genetics.

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D.Siren other. 2024. Extreme reorganization of cis-regulatory regions controlling deeply conserved plant stem cell regulators. PLoS Genet 20 (3): e1011174; doi: 10.1371/journal.pgen.1011174

Source: www.sci.news

Scientists Uncover Four New Emperor Penguin Colonies in Antarctica through Fecal Analysis

Emperor penguins are the largest species of penguin, often weighing around 90 pounds. However, they also have one of the most precarious breeding methods on the planet.

To ensure their chicks leave the nest in the summer, they breed during the coldest months of the year, when temperatures are close to -50 degrees Fahrenheit and Antarctic winds can gust at 190 miles per hour. Male penguins keep their chicks warm by balancing eggs on their feet, and colonies of up to 5,000 penguins huddle together to stay warm, each with their own body temperature. They are said to be walking around with a limp so that they can take turns.

But these animals do all of their breeding on Antarctic sea ice, and last year’s sea ice reached its lowest peak since scientists started measuring it in 1979. Some scientists fear that the decline is now so extreme that it has become an inevitable snowball effect.

If the ice sheet breaks before the emperor penguin colony leaves its chicks, the chicks will fall into the water and die, Fretwell said. That has happened over the past two years, particularly in 2022, with another study by Fretwell published last year showing “complete breeding failure” in all but one of the five known breeding sites.

The new colonies identified by Fretwell are mostly small. They said in a paper published in the journal Antarctic Science that at least some penguins appear to have migrated because of unstable sea ice conditions.

“If the colonies fail, they will move to other areas,” Fretwell told NBC News.

“We spend all this time monitoring these animals and seeing if they can adapt to climate change, but the truth is that penguins ultimately need to adapt. Not us,” Fretwell added. “We need to end our dependence on fossil fuels, not just for penguins, but for all species and ourselves.”

Source: www.nbcnews.com

Archaeologists Uncover Ancient Urban Center System in the Ecuadorian Amazon Dating Back 2,500 Years

The Amazon forest is dense as it is and difficult to penetrate, either on foot or with scanning technology. But over the past few years, improved light detection and ranging scans have begun to penetrate the forest canopy, revealing previously unknown evidence of past Amazonian cultures. In a new paper, CNSR archaeologist Stephen Rostain and his colleagues describe evidence of such an Amazonian agricultural culture that began more than 2,000 years ago. The authors described more than 6,000 platforms distributed in a geometric pattern connected by roads and intertwined with agricultural landscapes and river drainage channels in the Upano Valley of Amazonian Ecuador, at the eastern foothills of the Andes. Such large-scale early development in the Upper Amazon resembles similar Maya urban systems in Central America.


Rostain other. They discovered a dense system of pre-Hispanic urban centers, characterized by constructed platforms and plazas, and connected by large straight roads.Image credit: Rostain other., doi: 10.1126/science.adi6317.

Although a growing number of studies focus on the extent and scale of pre-Hispanic occupation of the Amazon, evidence of large-scale urbanization remains elusive.

Rostain and his co-authors found evidence of an agricultural civilization that began more than 2,500 years ago in the Upano Valley of Amazonian Ecuador, a region at the eastern foothills of the Andes.

“Based on more than 20 years of interdisciplinary research, including fieldwork and light detection and ranging (LIDAR) mapping, we depict urbanism on a scale never before recorded in Amazonia,” they said. said.

“We describe the construction of more than 6,000 anthropogenic rectangular earth platforms and plazas connected by footpaths and roads and surrounded by extensive agricultural landscapes and river drainages within 300 km.2 This is the research area. ”

The authors identified at least 15 different settlements of varying size based on clusters of structures.

However, the most notable element of this built environment is the extensive and complex regional road network that connects the city center with the surrounding hinterland.

Archaeological excavations show that the construction and occupation of the platforms and roads took place between 500 BC and 300-600 AD, and was carried out by groups of the Kiramopu culture and later the Upano culture.

Such large-scale early development in the upper Amazon is comparable to similar Maya urban systems recently noted in Mexico and Guatemala.

“The Upano site is different from other monumental sites discovered in the Amazon; these are more recent and less extensive,” the researchers said.

“Discoveries like this are another vivid example of how the Amazon's dual heritage, not only environmental but also cultural and indigenous, is undervalued.”

“We believe it is important to radically revise preconceptions about the Amazonian world and, in doing so, reinterpret contexts and concepts in terms necessary for inclusive and participatory science.”

team's paper Published in the January 11th issue of the magazine science.

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Stefan Rostain other. 2024. Two thousand years of garden urbanization in the upper Amazon River basin. science 383 (6679): 183-189; doi: 10.1126/science.adi6317

Source: www.sci.news

Researchers uncover connection between finance and topology

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Recent research reveals a new approach that exploits persistent homology to improve stock market volatility prediction. This method has improved the accuracy of various predictive models and has significantly advanced topology and financial integration. Credit: SciTechDaily.com

In a new study published in Journal of Finance and Data Scienceresearchers at Han University of Applied Sciences International School of Business in the Netherlands, have introduced topological tail dependence theory, a new methodology for predicting stock market volatility during turbulence.

“This research bridges the gap between the abstract field of topology and the real world of finance. What’s really interesting is that this combination will help us better understand and predict stock market behavior during turbulent times. “We now have a powerful tool to do this,” said Hugo Gobat-Souto, sole author of the study.

Since the difference in the average distance of normalized stock returns for two different periods is higher than the average distance in normal times than in the preceding and subsequent periods, defining a threshold to be used in normal times can help reduce the difference in periods of financial turmoil. can be used as an indicator to predict. A turbulent time. Nevertheless, a problem with this approach is the fact that the average distance of normalized price returns suffers from the curse of dimensionality and cannot detect nonlinear and complex relationships in the data. The curse of dimensionality that the average distance of normalized stock returns suffers from is that the number of dimensions (stocks in this case) tends to be infinite, so the distance between any point (say A and B) and the other The distance between points (such as A and C) approaches 1. As a result, the average distance becomes meaningless. On the other hand, his implementation of PH information via Persistent Landscape’s WD or L^n norm does not have these problems. Therefore, this is the reason for the successful introduction of PH information in recent studies and the selection of PH information in this study. Above is his 3D scatter plot from December 16, 2019 to January 16, 2020 (regular period). Credit: Hugo Gobato Souto

Enhance financial forecasting with persistent homology

By incorporating persistent homology (PH) information through empirical testing, Souto Accuracy Leveraging nonlinear and neural network models to predict stock market volatility during turbulent periods.

3D scatter plot from January 17, 2020 to February 19, 2020 (first period). Credit: Hugo Gobato Souto

“These findings signal a major shift in the world of financial forecasting, providing more reliable tools for investors, financial institutions and economists,” Sout added.

In particular, this approach avoids dimensionality barriers and is particularly useful for detecting complex correlations and nonlinear patterns that are often difficult with traditional methods.

“It was interesting to observe that forecast accuracy consistently improved, especially during the 2020 crisis,” Souto said.

3D scatter plot from February 20, 2020 to March 23, 2020 (turbulent period) Credit: Hugo Gobato Souto

Broad implications and future directions

The findings are not limited to one particular type of model. It spans a variety of models, from linear models to nonlinear models and even advanced neural network models. These discoveries open the door to improved overall financial forecasting.

“This discovery confirms the validity of the theory and encourages the scientific community to delve deeper into this exciting new intersection of mathematics and finance,” Souto concluded.

References: “Topological tail dependence: Evidence from forecasting realized volatility” by Hugo Gobato Souto, October 14, 2023. Journal of Finance and Data Science.
DOI: 10.1016/j.jfds.2023.100107

Source: scitechdaily.com

Astrophysicists uncover the reason behind the absence of spiral galaxies in our supergalactic plane

Astrophysicists have discovered why spiral galaxies like the Milky Way are rare in the supergalactic plane, a dense region of our local universe. The study, led by Durham University and the University of Helsinki, used simulations on the SIBELIUS supercomputer to show that dense galaxy clusters on a plane frequently merge, transforming spiral galaxies into elliptical galaxies. The discovery is consistent with telescope observations, supports the Standard Model of the Universe, and helps explain long-standing cosmic anomalies in the distribution of galaxies.

Astrophysicists say they have found the answer to why spiral galaxies are similar to our galaxy

This image showing an elliptical galaxy (left) and a spiral galaxy (right) includes near-infrared light from the James Webb Space Telescope and ultraviolet and visible light from the Hubble Space Telescope. Credits: NASA, ESA, CSA, Rogier Windhorst (ASU), William Keel (University of Alabama), Stuart Wyithe (University of Melbourne), JWST PEARLS team, Alyssa Pagan (STScI)

Evolution of galaxies in dense star clusters

In dense galaxy clusters in supergalactic planes, galaxies frequently experience interactions and mergers with other galaxies. This transforms the spiral galaxy into an elliptical galaxy (a smooth galaxy with no obvious internal structure or spiral arms), leading to the growth of a supermassive black hole.

In contrast, away from the plane, galaxies can evolve in relative isolation, which helps maintain their spiral structure.

Innovative simulations and important discoveries

Research results will be published in a magazine natural astronomy.

The Milky Way is part of a supergalactic plane that includes several giant galaxy clusters and thousands of individual galaxies. Most of the galaxies found here are elliptical galaxies.

The research team used the SIBELIUS (Simulations Beyond the Local Universe) supercomputer simulation, which tracks the evolution of the universe over 13.8 billion years, from the beginning of the universe to the present.

Distribution of the brightest galaxies in the local universe. observed in the 2MASS survey (left panel) and reproduced in the SIBELIUS simulation (right panel). Both panels show projections in supergalactic coordinates down to about 100 megaparsecs (Mpc). The nearly vertical stripes of the sky represent the region of the sky hidden behind our Milky Way galaxy. The simulation accurately reproduces the structure seen in the local universe.Credit: Dr. Thiru Sawala

While most cosmological simulations consider random patches of the universe and cannot be directly compared to observations, SIBELIUS aims to accurately reproduce observed structures, including supergalactic planes. . The final simulation is in remarkable agreement with telescopic observations of the universe.

Contribution and significance of research

Study co-author Professor Carlos Frenk, Ogden Professor of Fundamental Physics at Durham University’s Institute of Computational Cosmology, said:

“This is rare, but not a complete anomaly. Our simulations reveal details of galaxy formation, such as the change from spirals to ellipses due to galaxy mergers.”

“Furthermore, the simulations show that the Standard Model of the Universe, which is based on the idea that most of the mass of the Universe is cold dark matter, is one of the most remarkable structures in the Universe, including the magnificent structure of which the Milky Way Galaxy forms part. This shows that the structure can be reproduced.”

The unusual separation of spiral and elliptical galaxies in the local universe has been known since the 1960s and was included in a recent list of “cosmic anomalies” compiled by renowned cosmologist and 2019 Nobel Prize winner Professor Jim Peebles. prominently mentioned.

Study lead author Dr Thiru Sawala, a postdoctoral fellow at Durham University and the University of Helsinki, said: lecture.

“Then we realized that simulations had already been completed that might contain the answer. Our research shows that the known mechanisms of galaxy evolution also work in this unique cosmic environment. Masu.”

Reference: “A distinct distribution of elliptical and disk galaxies across local superclusters as a ΛCDM prediction” by Til Sawalha, Carlos Frenk, Jens Jachet, Peter H. Johansson, and Guillem Laveau, 2023. 11 20th of the month, natural astronomy.
DOI: 10.1038/s41550-023-02130-6

The supercomputer simulations were run on the Cosmology Machine (COSMA 8) supercomputer hosted by Durham University’s Institute for Computational Cosmology on behalf of the UK’s DiRAC high-performance computing facility, and on CSC’s Mahti supercomputer in Finland. .

This research was funded by the European Research Council, the Academy of Finland, and the UK Science and Technology Facilities Council.

Source: scitechdaily.com