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Archaeologists have unearthed a monumental 2,700-year-old tomb at Vulci, an important ancient Etruscan town north of Rome. Despite repeated attempts by tomb robbers to loot this burial over the centuries, the tomb still contained a massive collection of grave goods, including weapons, gold and bronze plates, chariot parts, a rare pair of women's shoes, and a complete banquet set.

The burial, nicknamed the Tomb of the Stone Chamber, was excavated this summer, according to a translated statement from the Italian Superintendency of Archaeology, Fine Arts and Landscape for the Province of Viterbo and Southern Etruria (SABAP-VT-EM). But the discovery builds on work that French archaeologists carried out in the late 19th century.

In 1889, archaeologist Stéphane Gsell identified the circular enclosure of the Etruscan burial mound in the cemetery at Vulci. But while Gsell delineated what he thought was the perimeter of the grave, he never found the tomb itself because he ran out of time and money to dig further.

Now, archaeologists with the Return to Vulci project think they've finally found the burial chamber inside the "Gsell tumulus" — and it's much larger than they, and Gsell, expected.

"This is the burial. We are absolutely certain of it," Christian Mazet , an archaeologist at the British Museum and co-director of the project, told Etruscan Times . The discovery of weapons, parts of a chariot, gold objects and high-quality ceramics means "there is no doubt that this is a tomb of the very highest rank," he said.

The new excavation revealed the Tomb of the Stone Chamber, which dates to the seventh century B.C. Archaeologists uncovered the walls of the tomb's three burial chambers and found numerous artifacts preserved beneath the chambers' collapsed roofs, including jewelry, clothing and shoes.

In the side chambers of the tomb, archaeologists recovered much rarer items, according to the SABAP-VT-EM statement, such as a bronze tripod made on what is today the Greek island of Rhodes, just off Turkey's southwest coast. They also found a nearly complete banquet set, and some of the vessels were still in their original positions after spending centuries underground.

The Etruscan cemetery at Vulci is well known for its wealthy tombs, thousands of which were discovered in the 19th century. But although the Indigenous Etruscans ruled over central Italy for several centuries, their society began to decline in the fourth century B.C., owing to the rise of Roman civilization . Their language is only partly understood today, meaning most information about the Etruscans comes from archaeological sites such as Vulci.

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The Tomb of the Stone Chamber was built in Vulci's heyday. Gsell had estimated the size of the tumulus at around 102 feet (31 meters) in diameter, calling it a "new Cuccumella," referring to the largest Etruscan burial mound previously discovered at Vulci. (The giant Cuccumella tumulus had a diameter of roughly 230 feet, or 70 m.) According to Etruscan Times, the Return to Vulci project experts' initial calculations suggest that the Tomb of the Stone Chamber may have been similar in size to Cuccumella, ‪or perhaps even larger.

"Everything tells us that it is one of the most monumental at Vulci," Mazet told Etruscan Times.

The tomb and burial mound have been covered to preserve them, according to the SABAP-VT-EM statement, but research will continue in 2027.

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Rare fossils discovered in Japan more than 30 years ago are from a new species of armored dinosaur — one whose ancestors likely reached Asia by trekking across a land bridge, a new study finds.

The newly named dinosaur, a type of nodosaurid, is now one of just three species of its kind found in Asia to date. The scarcity of nodosaurids in Asia, and the fact that the newly described beast is similar anatomically to those from North America, hint that its species likely arose from a migration from North America to Asia via the Bering Land Bridge, an ancient strip of land that connected present-day Alaska and Russia, researchers reported in the February 2027 issue of the journal Cretaceous Research .

"It's super cool to see [the specimen] getting a new look and a new name," said Victoria Arbour , manager of research and collections at the Royal B.C. Museum in Canada. Arbour was not involved in the new work.

Nodosaurids are armored dinosaurs covered in bony plates. They are closely related to ankylosaurids, but they lack the heavy tail clubs ankylosaurids used to protect themselves from predators. Nodosaurid fossils have primarily been found in North America and Europe, though a few have been uncovered in Asia.

In the new study, a team of researchers revisited one such fossil specimen originally discovered in 1995 on Hokkaido, the northernmost main island of Japan. The scientists performed computed tomography (CT) scans of the fossils, which are somewhere between 93 million and 100 million years old, and include the back of the skull, part of the lower jaw, and several teeth and bony plates.

Ancestors of Nipponopelta yezoensis likely migrated along the North American coastline and across the Bering Land Bridge to present-day Japan, which was connected to mainland Asia at the time, a new study suggests. (Image credit: Masato Hattori) CT scanning enables researchers to make digital 3D models of specimens, and "lets you just get more information than you'd be able to have otherwise, because you can look inside without breaking [the fossil]," Arbour told Live Science.

Based on the CT scans and an anatomical analysis, the team determined that the fossils represented a new species of nodosaurid, which they dubbed Nipponopelta yezoensis . "Nippon" refers to Japan, and "pelta" means "shield" in Greek. "Yezo" is the traditional name for Hokkaido.

N. yezoensis is closely related to North American nodosaurids, the team found. The dino's ancestors may have migrated from North America to Asia via a land bridge in what is now the Bering Strait 100 million to 110 million years ago.

CT scans show where the recovered Nipponopelta yezoensis fossils would have been inside the animal's head. (Image credit: Oyabu et al 2026) Coastal dinosaur?

A separate team of scientists originally uncovered the N. yezoensis specimen in marine sediments — rocks that formed under ancient seas. Nodosaurids didn't live in the ocean, so the findings suggest that after the animal died, its corpse may have been swept out to sea along a river or estuary and eventually sank to the ocean floor.

Several other nodosaurid fossils have been found in similar marine deposits , suggesting the creatures lived along coastlines. That may have helped them migrate along the Bering Land Bridge and disperse by following the coast, study co-author Darla Zelenitsky , a dinosaur paleobiologist at the University of Calgary, told Live Science.

Nipponopelta yezoensis would have walked on four legs, eaten plants, and lived in a coastal region, researchers suggest. (Image credit: Genya Masukawa) But just because nodosaurids are most commonly found in coastal environments doesn't mean that they couldn't have lived further inland as well, said Jordan Mallon , a paleontologist at the Canadian Museum of Nature who was not involved in the research. Upland and mountainous regions tend to produce few fossils because erosion wears down rocks in these biomes, Mallon told Live Science. So it's possible nodosaurids lived there, even if there's no fossil record of these armored dinosaurs at these locations.

"The nature of the fossil record is that it's patchy and incomplete," Mallon said. "It's very hard to tell a comprehensive story when you've only got a few pages out of a phone book's worth of time."

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It's also not clear from the fossil record why so few nodosaurid species have been found in Asia compared with North America, Zelenitsky said. While several ankylosaurid species have been found further inland in Asia, few nodosaurid fossils have been unearthed on the continent.

"It could be the rock record, or just that [nodosaurids] weren't able to diversify as much in Asia," Zelenitsky said.

In future studies, "I hope that we find more of this animal," Mallon said. "It incites us to keep digging so that we can learn more about this animal and test some of our ideas about just what it is."

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In July 2025, a large, bright cosmic object visited from beyond our solar system. Only the third interstellar object ever discovered, the comet — named 3I/ATLAS — swooped through the inner solar system for about four months , briefly making it one of the biggest science celebrities in the world.

The interstellar object's fame stemmed in large part from controversial (and unsubstantiated) claims that it could be a source of intelligent alien technology , even though 3I/ATLAS behaved like a natural comet. However, according to the astronomers who are studying its mysteries in the data collected by dozens of telescopes and spacecraft, the ancient object may still have lessons to teach us about life in the cosmos.

3I/ATLAS is likely a preserved fragment of a planetesimal — a building block of a planet — from a distant system, Martin Cordiner , a researcher in astrochemistry and planetary science at NASA's Goddard Space Flight Center, told Live Science. Therefore, the comet's composition could offer clues to the prevalence of life's building blocks around distant stars. Some astronomers even hope this cosmic interloper will help constrain how likely life is elsewhere in our galaxy.

Blast from the past

Comets like 3I/ATLAS are important because scientists think they help "seed" planets with carbon-containing chemicals, Darryl Seligman , an assistant professor of astronomy at Michigan State University, told Live Science in an email. Some of these chemicals, like methanol, have simple structures. Others, like amino acids, are more complex. Together, these carbon-containing, or organic, compounds form the basis for biomolecules, like proteins and nucleic acids, that interact to produce life.

Samples returned from space rocks in our neighborhood strongly support the idea that they transported such molecules within the solar system. For instance, fragments from the solar system asteroid Bennu obtained during NASA's OSIRIS-REx mission contain all five nucleotide bases , the building blocks of nucleic acids. Matthew Belyakov , a postdoctoral researcher in planetary science at Caltech, noted that the Bennu samples also contained 14 of the 20 amino acids that form naturally on Earth.

3I/ATLAS, in its nearest close-up, taken by the Mars Reconnaissance Orbiter. Observations with space- and ground-based telescopes have found that the comet contains tons of organic molecules. But what does this mean for the prospect of life elsewhere in our galaxy? (Image credit: NASA/JPL-Caltech/University of Arizona) Inferences about such deliveries are possible only because the rocks are like time capsules: They emerge from the same swirling disk of gas and dust from which planets are born, and the chemical compositions of asteroids and comets don't change much after that. So, by studying space rocks that originate in other exoplanetary systems, "we can learn if they also contain the building blocks of life and could have helped to start life in exoplanetary systems," Seligman said.

Simulations suggest that comets that circle one planet before moving to another could similarly deliver such prebiotic molecules to baby exoplanets . However, there was no supporting observational data to back up this claim.

A chemical potpourri

To figure out which chemicals 3I/ATLAS contains, astronomers have been recording the comet's light intensity across a range of frequencies, using more than a dozen instruments on Earth and around the solar system. This was possible because the comet spewed tons of gas and dust to create a fuzzy bright halo , or coma, after the sun warmed it. Observations of this coma have turned up an eclectic group of chemicals essential for life as we know it.

One is hydrogen cyanide (HCN), which was detected by the Atacama Large Millimeter/submillimeter Array (ALMA). Despite its notorious reputation as a poisonous gas, HCN is important for creating life. A commentary noted that laboratory experiments dating back to the 1950s ‪—‬ including the famous Miller-Urey experiment , which attempted to recreate the conditions of primordial Earth ‪—‬ have found that HCN is involved in building molecules like amino acids.

The list of ingredients goes on. ALMA data also revealed that 3I/ATLAS released gigantic amounts of formaldehyde and methanol . Additionally, observations from the James Webb Space Telescope showed 3I/ATLAS spewing the greenhouse gas methane . This is important because, assuming the methane formed on planets in the comet's home system, it could have trapped heat on those planets, thus warming them and making them more hospitable to life.

Unlike other interstellar comets, 3I/ATLAS is rich in organic compounds, which NASA's SPHEREx telescope detected in early 2026. (Image credit: NASA/JPL-Caltech) The presence of all these molecules is significant, Cordiner said, because they are "heavily implicated in terrestrial prebiotic chemistry studies as key carbon and nitrogen feedstocks [raw materials] for helping build life's molecular precursors," he said. 3I/ATLAS is proof that these "feedstocks" also exist in pastures far beyond our solar system's fences.

These findings are especially important because astronomers couldn't study the previous two interstellar objects to the same extent, Seligman said. He noted that 1I/'Oumuamua, the first interstellar object ever detected in the solar system, was observable for only a few weeks.

"The second interstellar comet 2I/Borisov was discovered right before COVID, so a lot of observations were canceled because of that," Seligman added. (Cordiner noted that the few observations conducted on 2I/Borisov showed that it, too, appears to contain HCN.) In comparison, researchers had almost a year to study 3I/ATLAS with telescopes. These observations have shown that "3I/ATLAS is unique in terms of the *measured* chemical inventory," Cordiner said.

Not indicative of life

All of the chemicals that 3I/ATLAS appears to possess give us data about just one planetary system. But when combined with observations of other astronomical phenomena, 3I/ATLAS shows that the chemical building blocks of life are abundant across our galaxy. For instance, giant molecular clouds — dense regions of gas and dust that give rise to stars — contain nitriles and sugar acids that can form amino acids. The stuff of life, it seems, is plentiful in space.

James Webb telescope observations showed that 3I/ATLAS has a lot of methane. If its home system's planets contained similar amounts of methane, they may have warmed sufficiently to support liquid water and, possibly, life. (Image credit: NASA, ESA, CSA, STScI, M. Belyakov (Caltech), I. Wong (STScI), Image Processing: A. Pagan (STScI)) Related stories

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Ingredients aside, these findings don't prove that life itself has developed in 3I/ATLAS' home system (or anywhere else). All of the organic molecules that 3I/ATLAS appears to contain have simple chemical structures. Cordiner said mixtures of such molecules in the lab have transformed into more complex ones via processes like ice irradiation . However, such compounds have not been found on 3I/ATLAS, despite the billions of years the comet likely spent exposed to the unabated radiation of interstellar space.

Most of the chemicals 3I/ATLAS released while zipping past the sun come from the comet's radiation-exposed upper layers and not from its pristine interior, a January study found. This would mean that what astronomers have measured may not be present in the comet's home system.

Nonetheless, many astronomers, including Seligman's group, are continuing to study 3I/ATLAS' composition. There is also the exciting possibility of future interstellar visitors, which are all but guaranteed to make an appearance, thanks to the Vera C. Rubin Observatory in Chile , which is expected to spot dozens more. The elements and isotopes found in these objects will help in "building a map of where bio-precursors reside, across the history of the Galaxy," Cordiner said.

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Researchers in Japan have switched on "Shunkai," a neutral atom quantum computer that scientists hope to scale into a 10,000-qubit behemoth by March 2031.

Shunkai is the first full-stack system of its kind in Japan, meaning it features the software, control and hardware layers needed to read user inputs and return a result — not unlike a conventional PC. In theory, that means it should be easier for researchers to get some meaningful use out of the machine, with the team behind Shunkai planning to open it up to external users over the coming years.

In a statement , project lead Kenji Ohmori , a professor of photo-molecular science at the Institute for Molecular Science, said researchers' use of Shunkai would "lead to ripple effects on various fields in industry, academia, and government around the world."

The team behind the new machine plans to integrate it into an existing shared supercomputing facility to create a quantum-GPU hybrid computing center.

Quantum computers: Powerful but impractical

Unlike traditional, or "classical," computers, quantum computers operate according to the strange laws of quantum physics . In quantum systems, qubits — in the form of superconducting circuits, trapped ions or photons (among other modalities) — represent the fundamental building blocks of quantum information. These can exist as a 1, 0, or a " superposition " of both states at once.

However, qubits are notoriously fragile . Even minor environmental interference can destabilize or destroy the information they contain, making accuracy an ongoing challenge in the world of quantum computing. The error rate in qubits is thought to be roughly 1 in 1,000, compared with around 1 per billion or even 1 per trillion operations in classical computing bits.

It's why a huge amount of research is dedicated to quantum error correction . This field seeks to alleviate this inherent unreliability by building redundancies into the way information is encoded in qubits so that small errors don't scrap entire computations.

The broad aim is to create higher-quality qubits and then scale up the number of qubits in a system so quantum computers can finally compete with the world's fastest supercomputers .

This thorny issue, combined with quantum systems' need for elaborate cooling systems to keep them operational , makes them impractical outside of finely tuned lab environments.

A more reliable quantum system?

Shunkai, named after 17th-century Japanese astronomer Harumi Shibukawa , shirks at least some of those constraints. Rather than using supercooled circuitry, Japan's new system incorporates neutral atoms as qubits, captured and suspended using "optical tweezers."

These tightly focused laser beams capture atoms and arrange them inside a vacuum chamber, while microwaves or laser light are used to manipulate the atoms' quantum states and perform calculations. The results are then read by observing the fluorescence from each individual atom with a camera.

Importantly, Shunkai's use of neutral atoms as qubits instead of superconducting circuits means it can operate at room temperature . Because the arrangement of qubits in neutral-atom systems can be fine-tuned during calculations , researchers can also adjust which qubits interact with each other and create entanglement — a bizarre state of information sharing between particles over time and space — between different pairs.

This could help overcome two of the biggest obstacles facing practical quantum systems: scaling machines to large numbers of qubits, and correcting the errors that inevitably creep into quantum calculations.

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To that end, Shunkai will be partially opened to external researchers to develop applications and test and improve the system's quantum error correction capabilities, representatives from Japan's National Institutes of Natural Sciences said in the statement.

The quantum system will initially operate with around 50 qubits before expanding to roughly 500. The longer-term goal is considerably more ambitious: By March 2031, the team aims to scale Shunkai into a "large-scale, high-performance neutral-atom fault-tolerant quantum computer, with 10,000 physical qubits and quantum error detection and correction capabilities." Doing so would place it comfortably above the 6,100-qubit, neutral atom array demonstrated by Caltech researchers in October 2025.

"Neutral atom-based quantum computers have recently been rapidly attracting attention around the world as a new modality that could exceed the limits of the superconducting modality," Ohmori said. "I think it is extremely significant that now we have developed Japan's first full-stack quantum computer in this cutting-edge modality and started its operation."

Can you match these ancient devices to their pictures? Find out with our computing quiz!

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Scientists may have settled a decades-long debate about bat evolution, including controversial questions about when bats began to communicate and fly, a landmark study shows.

The new research, published Wednesday (Sept. 23) in the journal Nature , is the biggest bat DNA and fossil study ever conducted. Researchers created new, top-quality genome assemblies for 41 bat species, which they analyzed together with 62 existing sequences, providing a record dataset of 103 bat genomes and 44 bat fossils.

"It is extraordinary," study co-author Emma Teeling , a professor of molecular evolution and mammalian phylogenetics at University College Dublin, told Live Science in an email; "after decades of research and conflicting findings, we finally have uncovered how and when bats evolved."

The analysis suggests that bats arose in Europe around 65 million years ago, contradicting previous hypotheses proposing Asian , African or North American origins around 50 million years ago. Additionally, the researchers found that echolocation and true flight evolved early in bats, roughly 50 million years ago, rather than multiple times after modern bats began to diversify.

"This study transforms bat evolution research because it finally gives us a robust, resolved family tree and biogeography, something that's eluded scientists for decades," study co-author Sonja Vernes , a professor and head of the Neurogenetics of Vocal Communication Research Group at the University of St Andrews in the U.K., told Live Science in an email. "Get the tree right, and everything else about bat evolution starts to fall into place."

The study included members of all 21 recognized bat families, as well as some of the most remarkable bat species known on Earth. For example, the dataset contained the bumblebee bat ( Craseonycteris thonglongyai , also called the Kitti's hog-nosed bat), which, at about 1 inch, or 2.5 centimeters, long, is thought to be the smallest mammal on Earth; and the Madagascar's sucker-footed bat ( Myzopoda aurita ), which has suction cups on its wrists and ankles to help it cling to smooth surfaces.

The research team — which comprised 137 scientists affiliated with Bat1K , an international project to map the genomes of all living bat species — used advanced DNA sequencing and computational techniques to identify individual genes and redraw the bat family tree.

"The value we bring is in innovative methods and unparalleled data that together yield an evolutionary tree that includes all these key fossils," study co-author Liliana Dávalos , a professor of phylogenetics and tropical deforestation at Stony Brook University in New York, told Live Science in an email.

Among other discoveries, the researchers found that a 50 million-year-old fossil from southern France of the extinct species Vielasia sigei , which shows signs of advanced echolocation , sits within the oldest branch of the bat family tree, indicating that echolocation predates the diversification of modern bats. This finding, together with the result that true flight appeared early in bats, helps to explain why this lineage has been so successful and evolved into more than 1,500 species worldwide today, according to the study.

With a body length of about 1 inch, the bumblebee bat ( Craseonycteris thonglongyai ) is thought to be the smallest mammal on Earth. It occurs in western Thailand and southeast Myanmar. (Image credit: Daniel Whitby) After emerging in Europe, bats quickly dispersed into Africa, establishing a Europe-Africa hub from which they expanded into Asia, the Americas and Australia, the results suggest. Bats are the only mammals capable of true flight, meaning they flap their wings and don't simply glide or parachute. Throughout their evolution, they have acquired longer lifespans than other mammals of similar body size, surviving eight to 10 times longer than might be expected and showing few signs of aging and cancer, according to the study.

"Some bat species live remarkably long lives for their size, and can shrug off diseases that would make us seriously ill," Vernes said. "Until now, we didn't have a solid enough foundation to properly understand how bats evolved their most extraordinary traits, from flight and echolocation to their remarkable lifespans and resistance to disease. Now we do."

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The genomic resource built for the study lays the foundation for future research into bats' longevity and disease resistance, with potential benefits for humans, Vernes said. "If we can understand how they do this at the genetic level, it could eventually help us design bat-inspired approaches to improve human health," she said.

The findings could also aid bat conservation through genomic methods. Protecting bats is important because they help to maintain healthy ecosystems by pollinating plants, dispersing seeds and consuming huge numbers of insect pests, Vernes said. There is also more work to be done to identify the ancestor of all living bats, whose genome the researchers took a first stab reconstructing.

"For me, this isn't the end of the story," Vernes said; "it's just the first chapter."

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Earth's continents are losing fresh water much faster than scientists thought, mostly because aquifer pumping in regions like northern India, southern Iran and parts of the U.S. is 45% more pronounced, on average, than previous estimates suggested, new research shows.

The study used satellite data to map freshwater trends across the globe between 2002 and 2025. Thanks to a high-resolution rendering method, researchers revealed regional gains and reductions in terrestrial water storage that were 33% more marked, on average, than in previous studies. The amount of fresh water lost was much higher than the gains overall, highlighting the urgent need for better water management to stave off a global water crisis.

"It has become very dire in a lot of places," Hrishikesh Chandanpurkar , a hydrologist and the co-founder of the nonprofit Evergreen Resilience Institute, who was not involved in the study, told Live Science.

Researchers created a map of terrestrial freshwater trends from 2002 to 2025. They then attributed these trends to human and climate drivers. (Image credit: O'Neill, Rodell and Loomis, 2026. PNAS . (CC BY 4.0) .) The study also attributed the changes in freshwater storage to different human and climate drivers, said first author Mary Michael Forrester O'Neill , a researcher at the University of Maryland's Earth System Science Interdisciplinary Center and the Hydrological Sciences Laboratory at NASA's Goddard Space Flight Center.

"Earlier studies could see broad patterns of long-term freshwater loss or gain but couldn't reliably tell how much was due to human activity versus climate swings, in part due to resolution limitations," Forrester O'Neill told Live Science in an email. "This study sharpened the picture and used geostatistical methods to rank the impacts of human causes, like irrigation and dam building, against climate factors, like rainfall and drought."

The researchers found 94 regions with above-background shifts in freshwater storage, 40 of which were influenced mainly by human land or water use, rather than climate variability and global warming . The team then focused on these 40 hotspots to pinpoint exactly where people can act to conserve water.

"Water managers and downstream communities need to know which aquifer, reservoir, or irrigation district is responsible for a given trend in large-scale freshwater storage, not just that 'somewhere in this country, water is being lost,'" Forrester O'Neill explained.

Freshwater gains in 22 regions were due to rain-fed agriculture, irrigation with surface water, reservoir impoundment and deforestation, which decreases evapotranspiration and plants' groundwater consumption, according to the study. In contrast, freshwater losses in the remaining 18 hotspots were caused by irrigation with groundwater and the construction of canals, diversions and other water infrastructure.

The findings, published Sept. 14 in the journal PNAS , show that human water use is a significant driver of water storage changes on every continent except Australia and Antarctica , where climate factors are more influential, O'Neill said. Local freshwater gains and losses may cut freshwater availability downstream or in the surrounding region, she and her colleagues noted in the study.

One example of a region that gained fresh water in the study is the area of central Russia that hosts the Boguchany Reservoir, a giant artificial lake that was filled in 2012 after the construction of a hydroelectric dam. And three stark examples of places that lost fresh water are northern India, southern Iran and the southern High Plains (a region at the intersection of Colorado, Kansas, New Mexico, Oklahoma and Texas), because these regions host major breadbaskets that tap aquifers for irrigation, O'Neill said.

The results are concerning because the places with the worst groundwater depletion overlap with areas that irrigate crops unsustainably, O'Neill said. Previous research shows that critical food-producing regions ‪—‬ such as the U.S. High Plains, California's Central Valley, northern India, Pakistan, North China and the Fertile Crescent ‪—‬ consistently overuse groundwater. "Within these regions, we found the pace of depletion is considerably more severe than earlier estimates suggested, reinforcing food security concerns," she said.

One of the novelties of the paper is its very high resolution, said Chandanpurkar, who last year led a study describing "mega-drying" regions across the world and co-authored a report on continental drying . The new study used data from NASA's Gravity Recovery and Climate Experiment (GRACE) mission and its Follow-On successor (GRACE-FO), which have measured subtle redistributions of mass on Earth. But unlike previous studies, the new research resolved the data in high resolution, he said, like correcting blurry vision with glasses.

"This is not a brand-new method, but it's the first time they're applying it to these regional hotspots and then trying to figure out what they mean," Chandanpurkar said.

The new study (A) produced a much sharper picture of freshwater trends than standard processing methods and previous studies did (B). (Image credit: O'Neill, Rodell and Loomis, 2026. PNAS . (CC BY 4.0) .) Scientists already knew that groundwater depletion and other human water uses are "quite staggering," and this study is a reminder that continental drying is "a very big deal," Chandanpurkar said. "Water is really undervalued," he said. "Giving it its proper dues would be essential for this [freshwater loss] to really be acknowledged by leaders and economists."

It's impossible to say exactly how many years or decades humans can go on consuming this much fresh water before it runs out , partly because the climate can be unpredictable and partly because it's hard to tell how much water remains in Earth's reservoirs, Forrester O'Neill said.

"GRACE satellites measure the rate of change in water mass, not the total volume stored in an aquifer, so we have no independent basis for estimating time to depletion or a timeline for systems to collapse," she said.

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However, there will come a point when the cost of pumping groundwater, for example, will be too high to pay in some regions. Water table declines of just a dozen feet (a few meters) or so can cause a substantial share of wells to run dry, research shows , and the expense of drilling deeper will affect at-risk communities most of all, Forrester O'Neill said.

"We are most concerned about the rising cost and inequity of continuing to reach water that keeps retreating deeper underground, paired with strain on existing surface water resources," she said. "Of course, water-scarce regions exhibiting acute groundwater depletion are at risk, like Iran , Saudi Arabia, Syria, Türkiye, Iraq, and Libya. Another one to keep an eye on would be Mexico , simply because of the documented, progressively increasing well depth paired with the observed terrestrial water storage loss."

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Google DeepMind has revealed a new artificial intelligence (AI) tool that can predict the molecular impacts of tweaking any one of the billions of letters that make up our genetic code.

On Sept. 8, Google's AI powerhouse announced a freely available database called AlphaGenome Atlas , which contains data on 9 billion possible changes to the human genetic code and estimates how these changes will affect different tissues and cellular processes. What's more, the tool spits out a simple score to help scientists quickly weigh the knock-on impacts of these changes.

How a sequence of 3 billion or so letters of chemical code is packaged, delivered and read to create a human life is a major question in genetics research. Last year, DeepMind announced a tool that could propel researchers toward an answer. The tool, called AlphaGenome , predicts how changes to a DNA sequence alter proteins, cells and, ultimately, the human experience.

Now, one year later, DeepMind has released AlphaGenome Atlas, which the tech giant hopes will make AlphaGenome accessible to more researchers.

"It looks like a great resource," Greg Findlay , a group leader at the Francis Crick Institute in London who isn't involved with AlphaGenome Atlas, told Live Science. However, other experts said that, although the tool is a step forward, it still can't answer all of the big questions in genetics .

"It's not this holy grail," Tuuli Lappalainen , a professor in genomics at KTH Royal Institute of Technology in Stockholm and a senior associate faculty member at the New York Genome Center who isn’t involved with AlphaGenome Atlas, told Live Science.

Reading the future of genetic variants

Lappalainen's lab has been using AlphaGenome to study the effects of variation in genomes over the past year. She pointed out that this technology is not new. However, according to Google DeepMind, AlphaGenome outperforms previous models in the resolution at which it can predict the impact of changes to the genome. Around 98% of our DNA is noncoding , meaning cellular machinery doesn't directly read it to make the proteins that keep our cells functioning.

Geneticists now appreciate that this code, once thought to be "junk" DNA, is instead needed to manage how and when to read the parts of the genome that do encode our molecular building blocks, or coding genes. However, evolution hasn't produced an ordered genome. Instead, some regulatory instructions are distributed widely throughout the code.

AlphaGenome allowed researchers to explore how changes in a single pair of DNA "letters" could influence up to 1 million pairs of surrounding code ‪—‬ a far greater spread than previous models were capable of and one that captured much of each gene's regulatory network.

You really do not need to be an expert in these methods to be able to go there and look something up in a browser.

Tuuli Lappalainen, professor in genomics at KTH Royal Institute of Technology and a senior associate faculty member at the New York Genome Center

But this power came at a price. Until the release of Atlas, AlphaGenome required users to have enough bioinformatics experience to access and use the models' automated programming interface ‪—‬ an area of expertise not all geneticists have. What's more, calculating the effects of each change was a strenuous workout for academics’ computing resources.

To create AlphaGenome Atlas, DeepMind researchers computed every possible base ("letter") change and made the resulting data ‪—‬ totaling 1 petabyte, or 1 million gigabytes, of information ‪—‬ freely available. This takes the load off academics' overworked personal computers. What's more, the technology is now wrapped up in an easy-to-access, user-friendly web portal.

"You really do not need to be an expert in these methods to be able to go there and look something up in a browser," Lappalainen said.

Another simplification is the AlphaGenome Variant Impact score, a metric that predicts how much biological effect a change will have. In an accompanying preprint paper , DeepMind showed that the score could separate disease-linked mutations from harmless ones in a clinical dataset. While the score's simplicity might make it harder to interpret in certain cases, Lappalainen said, it would be useful for researchers who want to investigate a list of gene variants.

Clouds in the crystal ball?

The tool still isn't a perfect predictor, however. A Sept. 11 preprint study from a research team led by Katie Pollard , director of the Gladstone Institute of Data Science and Biotechnology and a professor at the University of California, San Francisco, suggested that while AlphaGenome was adept at finding causal mutations, it persistently underestimated their impact.

Pollard's team found that the model couldn't always link changes in regulatory elements to the genes they controlled, especially when they were not close together on the genome. "My perhaps naive hope would be that people take these predictions with an appropriate grain of salt," Lappalainen said.

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Despite these limitations, Lappalainen said advances like AlphaGenome Atlas are part of a wider move toward more collaborative, data-led genomics. But she warned that the field would need to give equal focus to "wet-lab" experiments, which work out the accuracy of variant predictions.

Although these tests are tedious and consume much more time than a search on AlphaGenome Atlas' interface, she said, they are essential for generating the data that AI models need to improve their predictions.

"We're still very much data-limited in biology, and that data needs to be created," Lappalainen said.

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Archaeologists have unearthed a 3,000-year-old burial of a horse, likely used for military purposes, inside an ancient fort on the western Nile Delta in Egypt.

The horse was a young male of medium size that may have pulled a chariot or worked in other military activities. Archaeologists also found remains of the chariot horse's harness fittings nearby. Given these discoveries, it's likely that this was a ceremonial burial, according to a translated statement from the Egyptian Ministry of Tourism and Antiquities.

Some of the hieroglyphic tablets found inside the fortress along with a tablet depicting a captured Libyan prisoner. (Image credit: Courtesy of the Egyptian Ministry of Tourism and Antiquities.) The fort, which was found at the archaeological site of Abqaa' in Egypt's Lake District, dates to the New Kingdom period (circa 1550 to 1070 B.C.) and was used to guard against hostile Libyan tribes to the west. Among the finds from the fort excavation was a tablet depicting a Libyan prisoner whose clothing signifies his membership in the Meshwesh tribe, a group that Egypt was often in conflict with.

The prisoner is shown with his hands bound behind his bent body, a posture that signifies his submission, the statement noted.

A hieroglyphic tablet with the name of pharaoh Ramesses II was also found; he reigned from about 1279 to 1213 B.C. A second tablet included the name of the pharaoh Merneptah, who reigned from about 1213 to 1203 B.C., and compared his strength to that of Seth , an ancient Egyptian god associated with the desert and storms.

"An amazing find"

The horse burial is a unique discovery, scholars not associated with the excavation told Live Science.

"It is an amazing find, simply because we have so few horse remains from Pharaonic Egypt," especially complete skeletons, Lonneke Delpeut , a researcher at the University of Vienna who has conducted extensive research into ancient Egyptian horses, told Live Science in an email.

Archaeologists have found the remains of horse stables, such as those at the ancient Egyptian capital of Pi-Ramesses, but horse remains have been scarce, Delpeut said. "This horse will therefore surely contribute to what we know about the use of horses in military forts, of which there are many in the region."

Part of the fort, which was in use during the New Kingdom period. (Image credit: Courtesy of the Egyptian Ministry of Tourism and Antiquities.) But Delpeut cautioned against definitively calling it a war horse, "mainly because we do not have a definition of what a war horse is in ancient Egypt," she said. "It was certainly a chariot horse. Horses revolutionised mobility and warfare in ancient Egypt, so this horse was without a doubt a valuable animal, reflected by its careful burial."

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Carolyn Willekes , an expert on ancient horses at Mount Royal University in Calgary, Canada, told Live Science in an email that the discovery is exciting. "Well-preserved horse remains have the potential to provide important information about the life of that individual horse," she said. The "fact that this appears to be an intentional horse burial also gives tantalizing hints about the equine-human relationship in ancient Egypt and the cultural importance of the horse," Willekes said.

An archaeological team from the Egyptian Ministry of Tourism and Antiquities made the discovery. Live Science contacted the team for comment but had not heard back at time of publication.

Are you a fan of mummies and hieroglyphs? Find out with our ancient Egypt quiz!

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By all accounts, Donnie Darko shouldn’t exist.

The film, which turns 25 years old this year, ran into numerous obstacles both before and during its storied production. For one, the script centers on a troubled teen ultimately driven toward gun violence — a topic most Hollywood executives at the time stayed well away from, especially in the wake of the 1999 Columbine High School massacre.

Then there’s the story of how writer-director Richard Kelly shot the infamous opening sequence — “Never Tear Us Apart” by INXS — without first securing the rights to the song, a leap of faith that could have well ruined one of the film’s most iconic moments.

Last but not least, Kelly was not a seasoned filmmaker at the time, but a 25-year-old University of Southern California grad making his first feature. “I had a lot of anxiety,” Kelly tells Big Think. “If you look at behind-the-scenes camcorder footage, you can see the weight dripping off my body. I was this skeletal kid, trying to keep it together. But I knew what I wanted, visually, and that got me through.”

If you’re a fan of Donnie Darko, you might already know all this. You’ll also know that, despite the many challenges, the film not only made it to theaters but eventually became a cult classic — steeped in 1980s nostalgia, it became a defining film for millennials and continues to resonate with audiences today.

What you may not know is that Kelly, now in his 50s, is gearing up to release a long-awaited sequel. Titled The Philosophy of Time Travel , it’s coming out this December. But unlike the original, it’s not a film, but a novel — one Kelly thinks has enough material for multiple cinematic adaptations.

“Whether we’ll actually get a Donnie Darko 2 , we’ll have to see,” he says. “But we certainly can go there if the audience wants to.”

Mental novels

One of the many things that makes the original Donnie Darko such a memorable film is its fleshed-out world, which seems to tell a much larger story than the one unfolding in the film itself.

This is no accident. “When I’m working on a screenplay,” Kelly explains, “I’m basically adapting a novel that already exists in my mind, but which I haven’t bothered to write down.”

Although he previously produced a series of graphic novels based on his 2007 film Southland Tales , a dystopian black comedy starring Dwayne Johnson in one of his first big acting roles, The Philosophy of Time Travel will be Kelly’s first true novel.

For once in his career, he says, “I didn’t just hopscotch over this part of my writing process, and gone through the laborious and agonizing process of putting together a novel and getting it published.”

Agonizing, because although he’s clearly got a talent for it, Kelly has always considered himself a “director first and a writer second,” someone who thinks not in words but images like the unsettling bunny costume worn by Frank, the strange entity that warns Donnie of the “end of the world.”

Kelly, who began drawing and painting at a young age after his parents enrolled him in an art class, met with numerous artists, only to nail down the costume’s design himself. Inspired by the rabbits of Watership Down , the final look is less Easter Bunny and more predatory, with a toothy grin and large, white eyes reflecting moonlight.

Inside The Philosophy of Time Travel

The Philosophy of Time Travel covers a time frame of about 14 months and picks up less than 48 hours after the end of the original film, where an airplane engine falls on top of Donnie’s bedroom, killing him.

“But it also described what happened during the days before his death,” Kelly says. “People are convening to figure out what the hell happened. Was Donnie murdered, or did he take his own life? And what does his death mean?”

Kelly describes the novel as a “gigantic procedural murder mystery,” the action moving from Donnie’s traumatized Los Angeles community to the Mojave Desert and the Oval Office.

He also says he wrote The Philosophy of Time Travel in large part to respond to persistent questions from fans of Donnie Darko. “Why didn’t Donnie get out of bed at the end of the movie? Why was he laughing hysterically? What about that weird drawing he makes in physics class?”

In the original film, these questions go largely unanswered. At the time, they provided cause for speculation and analysis while also imbuing the film with a kind of mystery-for-mystery’s-sake, not unlike David Lynch’s Twin Peaks . This time, these loose ends provide the building blocks for a new story, one that promises more answers than questions.

Kelly describes the original film as a “jigsaw puzzle that is only 70% complete. You’ve got all these remaining pieces floating around because you haven’t quite figured out where they are supposed to go.”

A film misunderstood

In a way, Kelly began working on The Philosophy of Time Travel back in 2001, when he took all of the extra material that didn’t make it into Donnie Darko and incorporated it into the film’s official website.

This included passages from the fictional book of the same name referenced in the film, written by Roberta Sparrow and given to Donnie by one of his high school teachers. Kelly wrote some while working on the script, others in the middle of filming, making it up as he went along. These constitute the skeleton that The Philosophy of Time Travel is built around.

Kelly’s decision to continue Donnie Darko’s story is also a response to how the original film was understood, or maybe misunderstood.

“Some people just want the film to be its own, standalone thing,” Kelly says. “A lot of people want it to just be about schizophrenia and the like, but that’s not what Donnie Darko is to me. To me, it’s a big science fiction world that delves into a lot of big ideas.”

While many people think that Donnie is mentally ill, and that Frank is an apparition, Kelly himself has always understood the film as being about alternate dimensions or “tangent universes” reaching out to ours via people like Donnie — aspects of the story that were previously kept in the background but will now take center stage.

No regrets

Although he prefers directing films over writing novels, Kelly believes the struggle was worth it. “It’s been a huge challenge, but I didn’t want to live out the rest of my life without giving a crack at continuing to tell what I always felt was an unfinished story, the beginning of something greater.”

Asked whether The Philosophy of Time Travel could ever make it to the big screen, Kelly says that the novel contains enough material for three feature films.

He is particularly excited about taking the Donnie Darko franchise into animation: the medium he’d choose if he were to have made the original film today.

“Technology is now in a place with animation where we can do things that we couldn’t do decades ago,” he says, listing motion capture as one example. “A sequel could start in the animated realm and then, when there is a 28-year time-jump, become live action so all the actors can play their characters as they are.”

One feature of today’s entertainment industry Kelly isn’t too keen on is the rise of direct-to-streaming distribution models. “Everything is going to end up on a streaming service, maybe even our consciousness at some point. But the original was such a theatrical experience, and I’d love for people to have that again.”

Reflecting on his experience writing and rewriting Donnie Darko over the course of all these years, Kelly says he “would like to make a film where, at the moment we send it off, I feel there is nothing left I would change. Not a single frame. Complete satisfaction. I hope that’s possible. I’m not giving up on it.”

This article 25 years later, “Donnie Darko” is finally getting a sequel is featured on Big Think .

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The crust under Italy is "unzipping" and falling away into the mantle, new research finds.

This process is the driver of much of the seismic activity in the Apennine Mountains, the long chain of peaks that runs like a spine down the Italian peninsula. This area provides a unique look into the swan song of subduction, or the movement of a slab of oceanic crust under a neighboring chunk of continental crust, said study lead author Stefano Tavani, a geoscientist at the University of Florence.

"We are experiencing the very, very late-stage to the subduction, and the tectonics is driven by a different engine, which is this unzipping," Tavani told Live Science.

The Mediterranean region, between Africa and Eurasia, is a patchwork quilt of tectonic microplates and mountain ranges, making the geology of the region extremely intricate. The big-picture geology is driven by the fact that the African plate, to the south, has been pushing northward, squeezing the crust and driving the sinking of an ancient ocean, the Tethys, into the mantle beneath the Apennine Mountains. This process has been ongoing for about 50 million years.

A complex mix of tectonic forces has built the Apennines and led to the formation of the two basins in the Mediterranean that lie east and west of the islands of Corsica and Sardinia. (Image credit: 1xpert via Getty Images with labels added) Along the Apennines, this process created a push-and-pull of forces. As the African plate subducted under the Eurasian plate, the boundary of the subduction zone was making its own march toward the African plate, causing the crust on the Eurasian side to stretch and thin, creating two large basins: an older one in the Mediterranean Sea west of Corsica and Sardinia, and a younger one, the Tyrrhenian Sea segment of the Mediterranean east of Corsica and Sardinia, which formed roughly 10 million years ago. Until now, the driver behind the extension creating these basins and the compressional forces building the Apennines has not been entirely clear, Tavani said.

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To better understand this unusual tectonic movement, Tavani and his colleagues integrated earthquake record and ground movements from GPS and satellite measurements with the tectonic models of the plate movements and found that under the Apennines, the lower crust is peeling away and dropping into the mantle — a process called delamination. It is this delamination, and not the subduction of one plate under another, that causes most of the seismic activity in the Appennines, the researchers reported in their study published this month in the journal Communications Earth & Environment . In a few more million years, Tavani said, the lower crust will finish dropping away and the two plates will weld together.

There are other places around the world where similar processes are happening, such as in the Hellenic trench south of Greece, Tavani said. The findings "could be applied to other several systems," he said, "because in the end, it is a kind of very late-stage plate tectonics."

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As of Aug. 30, 2026, NASA's Curiosity rover has officially seen the sun rise and set over Mars' reddish horizon more than 5,000 times in its quest to discover if life ever existed there. The rover was originally planned to operate for only two years, but the mission is still going strong more than 14 years after landing on Mars in August 2012.

During that time, the rover has weathered global dust storms and climbed more than 3,200 feet (1,000 meters) up a mountain — although its tires have gotten some rather large holes in them in the process. The rover still uses its 17 cameras to take hundreds of photos every single sol (Martian day), beaming a total of more than 780,000 photos back to Earth for scientists to analyze while mission controllers decide where the rover should roam next.

In honor of the intrepid rover's 5,000th day on the Red Planet, here are 10 of the most iconic photos Curiosity has snapped for Earthlings to admire.

Sol 548: Mount Sharp on the horizon

(Image credit: NASA/JPL-Caltech) Curiosity snapped this photo of Mount Sharp on Feb. 19, 2014, about a year and a half after it landed on Mars. At the time, scientists were hopeful the rover could make it to the base of the 3.4-mile-high (5.5 kilometers high) mountain to explore interesting terrain previously seen from space. As the years passed, Curiosity more than surpassed that goal; the rover has climbed more than half a mile up into the mountain's foothills, traveling a total of more than 23.6 miles (38 km) from its landing spot, all while conducting important science along the way.

Sol 956: Blue skies on Mars

(Image credit: NASA/JPL-Caltech/MSSS/Texas A&M Univ) Curiosity took a photo of the Martian sunset in color for the first time on April 15, 2015, revealing a brilliant blue sky just before the sun dipped behind the shrouded mountains in the distance. The Martian sky is usually yellow to orange , according to NASA. Fine dust particles in the atmosphere scatter red and yellow light across the entire sky. However, the dust is just the right size for some blue light to slip past, so most of the light in the sky near the sun is blue. The effect is much more pronounced when the sun is low in the horizon.

Sol 1128: Curiosity Selfie at Namib Dune

(Image credit: NASA/JPL-Caltech/MSSS) Curiosity has taken numerous selfies over the course of its mission, although the process is a bit more involved than holding up a camera and smiling. This selfie was made from 57 separate images taken on Jan. 19, 2016 using a camera attached to its robotic arm. Here, Curiosity is standing next to Namib Dune, one of the many dark sand dunes that make up the Bagnold Dune Field near Mount Sharp. Curiosity sampled the sand for analysis and scuffed the dune with its wheels so scientists could see how the sand moved.

Sol 1819: Curiosity leaves a thumbprint in the dust

(Image credit: NASA/JPL-Caltech/MSSS) Mars is extremely dusty. The reddish dust gets swept into the atmosphere and cast across most of the planet's surface, making it difficult for scientists to figure out what materials are on the surface just by looking at them. On Sept. 17, 2017, Curiosity dusted off the surface of a rock at Vera Rubin Ridge and took a picture for geologists to compare to rocks on Earth. Based on the reddish purple color, geologists think this rock is fine-grained hematite split by fractures filled with calcium sulfate minerals. It hints that Mars might be a lot more colorful underneath its dusty blanket. Scientists have since discovered ruby-like materials embedded in Martian rocks .

Sol 3466: Totally not a door for aliens

(Image credit: NASA/JPL-Caltech/MSSS) On May 7, 2022, Curiosity sent a curious photo back to Earth that appears to show a small door carved into the face of a cliff. It's hard not to imagine little green people entering it after taking their little green dogs for a stroll across the dusty landscape, but it's not actually a doorway for Martians . The 3-foot-tall opening's boxy shape is caused by vertical fractures intersecting with horizontal layers in the rock, according to NASA. The cliff is highly fractured, and a large chunk of rock that likely fell from the "doorway" is clearly visible nearby.

Sol 3724: Iridescent feather in the sky

(Image credit: NASA/JPL-Caltech/MSSS) Just after the sun went down on Jan. 27, 2023, Curiosity took this photo of a noctilucent (night-shining) cloud that formed much higher in the Martian atmosphere than most other clouds do. Any clouds on Mars are rare, but this one is extra special. Since this cloud is so high up, it's much colder — making scientists think it's made of carbon dioxide (dry ice) instead of water ice. The iridescent colors in the cloud indicate the ice particles making up the cloud are all around the same size, which means the cloud likely just formed at the time of the photo.

Sol 3725: Curiosity finds "Cacao"

(Image credit: NASA/JPL-Caltech/MSSS) The very next day after cloud-gazing, on Jan. 28, 2023, Curiosity found an iron-nickel meteorite measuring about a foot across. The meteorite, nicknamed "Cacao," is one of a handful of meteorites Curiosity has photographed. The rover zapped part of the meteorite with a laser and measured the vapor released to identify what materials the rock was made of. Since Mars is cold and dry compared to Earth, meteorites last much longer on its surface than they do here, and they give clues about how the Martian atmosphere has changed over time. Large iron meteorites discovered on Mars indicate the planet once had a denser atmosphere than it does today.

Sol 4208: Elemental sulfur crystal surprise

(Image credit: NASA/JPL-Caltech/MSSS) In June 2024, Curiosity unintentionally ran over a rock and crushed it , revealing a yellow, odorless surprise: rare crystals of elemental sulfur. While Mars has plenty of minerals that contain sulfur, like sulfate, this was the first time pure sulfur was found. The crystal fragments are about 5 inches (12.7 centimeters) across. On Earth, pure sulfur is formed from volcanic and hydrothermal activity, along with other geologic processes. It's not clear yet how these crystals formed on Mars.

Sol 182 - 4263: All 42 drill samples

(Image credit: NASA/JPL-Caltech/MSSS) Curiosity has collected and analyzed 42 rock samples so far using a small drill attached to a robotic arm. The drill powders the rock so that the samples can be transported to Curiosity's science instruments, which measure their chemical composition. Each sample site is carefully chosen because the rover can only do a limited number of samples before it runs out of special sample cups. This mosaic image shows the impressive variety of materials that Curiosity has sunk its drill into.

Sol 4671: Exploring Martian spiderwebs

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Researchers have been intrigued by large geologic structures like stone "spiderwebs" on the Martian surface, previously seen by spacecraft orbiting the planet. Curiosity visited them on the ground, taking this picture of the low ridges and hollows, called boxwork, on Sept. 26, 2025. The ridges, made from hardened minerals deposited by water seeping into cracked rock, are what's left after billions of years of erosion wore away the softer rock around them.

Curiosity's journey continues today. After leaving the boxwork structures last March, the rover set off to explore more of the Martian landscape with its cameras as busy as ever, looking for more evidence that Mars once had the water and chemistry to possibly support ancient microbial life.

What do you know about the Red Planet? Test your knowledge with our Mars quiz!

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The patient: A 16-year-old boy in India

The symptoms: The teen developed swelling on his left upper eyelid that persisted for a few months but was painless. However, he later noticed two sharp, white projections poking out from the skin above his eye.

About a month after these projections appeared, he went to a hospital.

What happened next: Doctors examined the teen's eyelid, noting that the spikes had a "fairly smooth surface and were hard on palpation," said Dr. Meghana Tanwar , a medical consultant at the Aravind Eye Hospital in India who co-authored a report of the case . The texture and color of the projections suggested they might be teeth, she told Live Science in an email.

Initially, the doctors thought the points also might have been related to a teratoma, a rare type of tumor that can include different types of tissue, including bone and tooth tissue. They also wondered if the projections might be a foreign body in the eyelid. They conducted a CT scan to take a closer look.

The diagnosis: The scan revealed that the projections were indeed part of a tooth.

"The structure of a lone tooth in the superior orbit was quite obvious," Tanwar said. "Superior orbit" refers to the upper eye socket, and the tooth had poked out in the small space between the boy's eyelid and eyebrow.

Teeth that develop and erupt in abnormal locations are known as ectopic teeth. This umbrella term includes teeth that are in the mouth but erupt outside their typical positions; for instance, in about 2% to 6% of people , their first permanent molars grow "out of place" in the expected line-up of teeth.

In this case, though, the patient had an ectopic tooth that appeared completely outside the dental arch, which is far rarer .

The treatment: The doctors surgically removed the ectopic tooth from the patient's eyelid and found that it was a mature canine tooth. It didn't have any features that suggested it was part of a teratoma.

"Since the imaging done did not show the presence of any other ectopic teeth, the likelihood of him having another one are unlikely," Tanwar noted.

What makes the case unique: This is not the first ectopic tooth in the medical literature, but it was in a very notable location.

"To the best of our knowledge this is the first and only ectopic tooth reported in the superior orbit," Tanwar said. Previously, they've been reported in the nasal cavity and the bottom of the orbit, under the eye, she noted. According to MedPage Today , they've also been found in the nostrils , chin and maxillary sinus , which is located inside the cheekbone.

"This was a first not just for us but the world over," Tanwar said of the case. "We were very surprised by it."

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Prior to the case, Tanwar had personally seen a tooth in the bottom of the eye socket of a different patient, but it was part of a rare type of mass called an odontogenic choristoma.

In this teen's case, the underlying cause of the ectopic tooth was unknown. Hypotheses suggest that , in general, ectopic teeth may grow out of place due to developmental disorders, physical trauma, infection or genetic factors.

For more intriguing medical cases, check out our Diagnostic Dilemma archives .

This article is for informational purposes only and is not meant to offer medical advice.

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The hunt for extraterrestrial life on distant planets may be operating with a big blind spot.

That's because we aren't accounting for the nature of the light coming from the host star itself when we interpret the chemical signatures of life, or biosignatures, on some of the most promising candidate planets beyond the solar system. If we don't consider that crucial factor, we could be led on a wild-goose chase across the cosmos.

Despite having discovered thousands of exoplanets , we have not detected convincing evidence of alien life on any of them. But astronomy is reaching a point where powerful telescopes can zoom in on many more potentially habitable worlds. Planets that orbit M dwarfs, which are small stars cooler than the sun, are particularly promising targets because they have a unique observation window. When a planet passes in front of one of these stars, it blocks a relatively large fraction of the star's light, making the planet and its atmosphere easier to detect.

There are also a lot of them. M dwarfs are the most common type of star in the Milky Way . However, if we misunderstand how these stars interact with planetary atmospheres, we may misinterpret the significance of observations from some of the most promising planets.

The most-studied biosignatures are methane, oxygen and ozone. On Earth, these are often produced by biological processes, with ozone acting as an indirect indicator of oxygen. But even on our home planet, molecules typically associated with life are not unambiguous biological fingerprints . These molecules can be produced by geological and chemical processes, as well as via atmospheric reactions with light from the sun.

A potential biosignature detection found elsewhere in the cosmos is therefore a clue, not proof of life. We can't interpret the chemical signals coming from a potentially habitable planet without understanding the star that illuminates it. M dwarfs produce ultraviolet radiation that can break apart molecules and trigger chemical reactions in the atmosphere of an orbiting planet. The intensity and wavelength of the radiation influence which molecules form and survive, as well as how abundant they become. Two planets with otherwise identical properties could develop very different atmospheres simply because they orbit stars with different ultraviolet emissions. Radiation from a star could therefore make the same level of biological activity appear stronger on one planet than on another, or make nonbiological chemistry look like life. A recent study submitted to the preprint server arXiv Aug. 19 demonstrated this using entirely simulated planets. The researchers, led by University of California, Santa Cruz astronomy graduate student C. Evan Davis, simulated Earth-like planets orbiting two different types of M dwarf with ages ranging from 650 million to 5 billion years.

The team considered atmospheres resembling that of Earth during the oxygen-rich preindustrial era and the Archean eon (about 4 billion to 2.5 billion years ago), during which the first life-forms emerged but atmospheric oxygen was scarce. The models considered the stars' usual, or "quiescent," ultraviolet emission rather than short-lived flares. By changing the modeled stars' ages and ultraviolet radiation while keeping the planets comparable, they investigated how a star's evolution changed an atmosphere and the signals astronomers might observe.

The first convincing discovery of life on another planet will depend on an understanding of not only that planet but also the star that shaped the atmosphere we observe.

Alix Freckelton, astrophysicist

One of the clearest differences the team found appeared in methane. Simulated planets with preindustrial atmospheres orbiting 5 billion-year-old M dwarfs accumulated up to 10 times more methane than equivalent planets simulated to orbit the younger 650 million-year-old stars. The methane signals produced in the simulated data were up to 68% stronger for the older systems. The weaker UV emission from the older M dwarf allowed methane to survive longer and accumulate in the simulated planetary atmospheres. The stronger methane signal could make a planet orbiting an older star appear to support more biological activity, when this difference was actually caused by the UV emission of the host star.

An even more striking result came from ozone. For the simulated Archean Earth-like planets, which were low in oxygen and rich in carbon dioxide (CO 2 ), the stronger UV radiation from younger M dwarfs broke apart more CO 2 . This kick-started reactions that created oxygen and ozone without any life involved. Some model planetary atmospheres contained more than 100,000 times as much ozone as equivalent models around older stars. A hypothetical observer could misinterpret the resulting ozone signal as indirect evidence of biologically produced oxygen. Ozone is not useless as a biosignature, but these simulations show that it cannot be interpreted confidently without knowing the UV environment that shaped the atmosphere.

Of course, astronomers are already aware that a single molecule would not prove the existence of life on an exoplanet . Researchers use atmospheric models, look for combinations of gases, and consider nonbiological explanations before describing a signal as a potential biosignature. These methods remain valuable for identifying the most promising planets for further investigation, even when our knowledge of their stars is incomplete. Some might argue that these methods provide a sufficiently reliable first assessment and we should reserve more detailed stellar observations for the strongest candidates.

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A metal detectorist in the west of Germany has discovered one of the largest hoards of Roman silver coins ever found in that country from the reign of the Emperor Hadrian.

The pile includes more than 900 silver denarii — the denarius was the standard coin of the early Roman Empire — and weighs almost 7 pounds (3.1 kilograms).

The stash was discovered about a year ago in a field near the small city of Wesseling, a few miles south of Cologne, according to a translated statement from Germany's Rhineland regional government. It's now on display at the Rhineland Regional Museum in Bonn (LVR-Landesmuseum Bonn).

Archaeologists think the hoard was buried at the time of the Emperor Hadrian, who ruled from A.D. 117 to 138, because the most recent coin was minted in 124 or 125.

But the coins span more than three centuries: the oldest was minted in 148 B.C., during the time of the Roman Republic ; while most of them are from the time of the Flavian emperors — Vespasian and his sons, Titus and Domitian — from A.D. 69 to 96.

The coins span more than 300 years. The earliest were minted during the Roman Republic and the latest coin dates to the reign of the Emperor Hadrian. (Image credit: Marcel Zanjani/LVR-Office for the Preservation of Archaeological Monuments in the Rhineland) Silver signal

The statement praised the metal detectorist, Oliver Riedl, who found the hoard and stopped digging after unearthing 15 of the coins. At that point, his metal detector signaled that something much larger was hiding underground.

"It was clear to me that there was something bigger in the ground here," Riedl said in the statement. "I therefore immediately informed the office."

Riedl is licensed by the state to use his metal detector and has been trained by regional archaeological authorities, the statement said. ( Illegal metal detectorists also operate in Germany, but are known to often disrupt the archaeological value of their finds).

Archaeologists from the Rhineland regional government soon investigated the find and excavated the entire hoard of 934 Roman silver coins. The block of earth that contained the coin hoard was removed whole and X-rayed before it was opened, the statement noted.

Erich Claßen , the head of archaeology for the Rhineland regional government, said it seemed that the original owner collected most of the coins in about A.D. 100, but didn't actually bury them until Hadrian's time.

Most coins in the buried hoard date to the time of the Flavian emperors. This one is adorned with the likeness of Domitian, who ruled from A.D. 81 to 96. (Image credit: Marcel Zanjani/LVR-Office for the Preservation of Archaeological Monuments in the Rhineland) "We can only speculate about the motives, but very likely someone wanted to keep this money safe," he said in the statement. "Banks did not exist at that time."

But whoever buried it never came back. "It is possible that the owner died beforehand without being able to pass on the knowledge of the coins," Claßen said.

Buried treasure

Marjanko Pilekić , a numismatist, or coin expert, at the German Historical Museum in Berlin who wasn't involved in the find, said it was significant that the hoard was unearthed just inside the northern frontier of the Roman Empire demarcated by the Roman limes , which ran along the Rhine nearby.

He told Live Science in an email that the location suggested when the hoard had been purposefully buried: "In this case, we can cautiously assume that the hoard was buried not long after the most recent coin was minted," Pilekić said.

Outside the Roman Empire, however, in the Barbaricum – the "barbarian" regions beyond, according to the Romans — such hoards of coins were often buried much later, he said.

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While its historical value is priceless, the worth of such a hoard during the second century A.D. would have been considerable: 300 denarii was the yearly pay of a Roman legionary at the time of Hadrian, of which around half was deducted for food and equipment, regional archaeologist Rahel Otte , who led the excavation, said in the statement.

This means that a legionary "would have had to save all his available money for about six years to accumulate the Wesseling treasure find," she said.

She added that it was unclear who had buried the hoard, but it may have been someone who lived on one of the Roman estates in the area.

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