Man recovered from ‘gladiator graveyard' died of lion bite, study finds
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Legends of young heroes fighting lions to the death appear in Roman records and artwork, but scant physical evidence of these beastly battles exists.
Perhaps, that is, until now.
A new study sheds light on the story of a young man, likely between the ages of 26 and 35, discovered with a fatal bite mark from a large animal.
His remains were buried between 1,825 and 1,725 years ago in what archaeologists believe to be a 'gladiator graveyard' — hundreds of miles from Rome — in York, England.
The findings highlight the Roman Empire's sweeping impact across Britain — lending direct evidence that Roman culture and lifestyle spread far beyond the Colosseum.
The human remains at the heart of the new study have puzzled researchers since the burial site was uncovered in 2010.
Scientists involved in the expedition, led by the York Archaeological Trust, suspected the divots in the man's pelvis were the work of a carnivore.
But delving into the precise culprit showed the markings 'were likely made by a lion, which confirms that the skeletons buried at the cemetery were gladiators, rather than soldiers or slaves, as initially thought,' said study coauthor Malin Holst of the University of York.
Here's what the bone analysis revealed about the man and how the researchers determined what was behind the lethal bite markings.
Watch chimpanzees sharing fermented fruit, which contains intoxicating traces of alcohol. The first-of-its kind footage could highlight how the closest living relatives to humans may partake in a boozy treat to strengthen bonds that's similar to our social rites.
What's nearly as long as a bus, has teeth the size of bananas and has a scientific name that translates to 'terror crocodile'?
Behold: Deinosuchus.
The roughly 26-foot-long creature of nightmares is believed to have lived between 82 million and 75 million years ago, dining on dinosaurs in the rivers and estuaries of North America.
While prior research on the giant reptile's evolutionary background has put it in the same group as alligators and their ancient relatives, a new analysis of fossils and DNA suggests it belongs on a different branch of the crocodilian family tree.
That assessment boils down to one key trait: Deinosuchus had special glands and a tolerance for salt water, according to the study.
Further animating our understanding of the creatures that populated prehistoric Earth are trace fossils — or ancient animal tracks frozen in time.
Researching these fascinating rocks is like 'trying to study ghosts,' said Conner Bennett, lead author of a study that described the story behind several trace fossils in the collection of Oregon's John Day Fossil Beds National Monument.
The footprint fossils can pick up where bones leave off, confirming the presence of animals.
For example, one set of tracks estimated to be about 50 million years old tells the story of a small wading bird pausing near a lakeshore in central Oregon to search for food.
Without the footprints, the unprecedented evidence of birds in the ancient ecosystem may have been lost to time: Their fragile, hollow skeletons don't hold up well.
Tucked away in one of the world's largest collections of fossilized insects, the oldest recorded ant species nearly remained overlooked.
Anderson Lepeco, a researcher at the University of São Paulo's Museum of Zoology in Brazil, spotted the 'extraordinary' specimen as he was perusing some of the museum's fossils.
That's when he came across the hell ant, preserved in limestone. The critter was believed to have lived among dinosaurs some 113 million years ago — several millennia before previously found ants, according to new research.
'I was just shocked to see that weird projection in front of this (insect's) head,' Lepeco said. 'Other hell ants have been described with odd mandibles, but always as amber specimens.'
At wildlife conservancies in Africa, four-legged friends are invigorating efforts to combat poaching.
Professional dog trainers Darren Priddle and Jacqui Law of Carmarthen, Wales, spearhead the initiative, called Dogs4Wildlife. After they saw a picture of a poached African rhino on social media in 2015, they set out to use their expertise training animals to help combat illegal hunting.
'It was quite a horrific image. We sat down and we said, 'OK, that's really affected us,'' Priddle told CNN.
The duo has since sent 15 stalwart canines to five sub-Saharan African countries, including Shinga, a Belgian Malinois, and Murwi, a Dutch shepherd, who protect big game at Zimbabwe's Imire Rhino and Wildlife Conservancy.
Check out these must-read science stories from the week:
— The head of the US National Science Foundation stepped down from his post as the agency grapples with the Trump administration's demands.
— A Pakistani astronaut will become the first foreign national to enter China's space station, Tiangong.
— Scientists spotted a 1940s Ford automobile inside the sunken USS Yorktown, a World War II aircraft carrier lost during the Battle of Midway.
Before you go, it's time to look skyward: Saturday is the last day to catch a glimpse of the Lyrid meteor shower.
Like what you've read? Oh, but there's more. Sign up here to receive in your inbox the next edition of Wonder Theory, brought to you by CNN Space and Science writers Ashley Strickland, Katie Hunt and Jackie Wattles. They find wonder in planets beyond our solar system and discoveries from the ancient world.
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Some Dead Sea Scrolls may be even older than archaeologists thought, new study finds
Sign up for CNN's Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Many of the Dead Sea Scrolls, some of the most widely known archaeological finds of all time, may be older than once thought, according to a new study. The fresh analysis, which paired radiocarbon dating with artificial intelligence, determined some of the biblical manuscripts date to about 2,300 years ago, when their presumed authors lived, said Mladen Popović, lead author of the report published Wednesday in the journal PLOS One. Bedouin shepherds first spotted the scrolls by chance in the Judaean Desert, near the Dead Sea, in 1947. Archaeologists then recovered thousands of fragments belonging to hundreds of manuscripts from 11 caves, all near the site of Khirbat Qumran in what is now the West Bank. 'The Dead Sea Scrolls were extremely important when they were discovered, because they completely changed the way we think about ancient Judaism and early Christianity,' said Popović, who is also dean of the Faculty of Religion, Culture and Society at the University of Groningen in the Netherlands. 'Out of around 1,000 manuscripts, a bit more than 200 are what we call biblical Old Testament, and they are the oldest copies we have of the Hebrew Bible. They gave us a lot of information about what the text looked like back then.' The scrolls are like a time machine, according to Popović, because they let scholars see what people were reading, writing and thinking at the time. 'They are physical, tangible evidence of a period of history that is crucial — whether you're Christian, Jewish or don't believe at all, because the Bible is one of the most influential books in the history of the world, so the scrolls allow us to study it as a form of cultural evolution,' he said. Almost none of the Dead Sea Scrolls — which were written mostly in Hebrew on parchment and papyrus — have dates on them. Based primarily on paleography, the study and deciphering of ancient writing and manuscripts, scholars have believed the manuscripts range from the third century BC to the second century AD. 'But now, with our project, we have to date some manuscripts already to the end of the fourth century BCE,' he said, meaning that the earliest scrolls could be up to 100 years older than previously thought. 'That's really exciting because it opens up new possibilities to think about how these texts were written and how they moved to other users and readers — outside of their original authors and their social circles,' Popović added. The findings will not only inspire further studies and affect historical reconstructions, according to the authors of the report, but will also unlock new prospects in the analysis of historical manuscripts. Earlier estimates of the manuscripts' age came from radiocarbon dating conducted in the 1990s. Chemist Willard Libby developed this method — used to ascertain the age of organic materials — in the late 1940s at the University of Chicago. Also known as carbon 14 dating, a chemical analysis of a sample, such as a fossil or manuscript, determines the quantity of carbon 14 atoms it contains. All living organisms absorb this element, but it starts to decay as soon as death occurs, so looking at how much is left can give a fairly accurate age of an organic specimen as old as about 60,000 years. Carbon dating has downsides, however. The analyzed sample is destroyed during the process, and some results can be misleading. 'The problem with earlier tests (on the scrolls) is that they didn't address the issue of castor oil,' Popović said. 'Castor oil is a modern invention, and it was used in the 1950s by the original scholars to make the text more legible. But it's a modern contaminant, and it skews the radiocarbon result to a much more modern date.' The study team first used new radiocarbon dating, applying more modern techniques, on 30 manuscripts, which revealed that most of them were older than previously thought. Only two were younger. The researchers then used high-resolution images of these newly dated documents to train an AI they developed, called Enoch after the Biblical figure who was the father of Methuselah. The scientists presented Enoch with more documents they had carbon-dated, but withheld the dating information, and the AI correctly guessed the age 85% of the time, according to Popović. 'In a number of cases, the AI even gave a narrower date range for the manuscripts than the carbon 14 did,' he said. Next, Popović and his colleagues fed Enoch more images from 135 different Dead Sea Scrolls that were not carbon-dated and asked the AI to estimate their age. The scientists rated the results as 'realistic' or 'unrealistic,' based on their own paleographic experience, and found that Enoch had given realistic results on 79% of the samples. Some of the manuscripts in the study were found to be 50 to 100 years older than formerly thought, Popović said. One sample from a scroll known to contain verse from the Book of Daniel was once believed to date to the second century BC. 'That was a generation after the original author,' Popović said, 'and now with the carbon 14, we securely move it (further back) to the time of the author.' Another manuscript, with verses from the Book of Ecclesiastes, also dates older, Popović added. 'The manuscript was previously dated on paleographic grounds to 175 to 125 BCE, but now Enoch suggests 300 to 240 BCE,' he said. Eventually, artificial intelligence could supplant carbon 14 as a method of dating manuscripts, Popović suggested. 'Carbon 14 is destructive,' he said, 'because you need to cut off a little piece of the Dead Sea Scroll, and then it's gone. It's only 7 milligrams, but it's still stuff that you lose. With Enoch, you don't have to do any of this. This a first step. There are all sorts of possibilities to improve Enoch further.' If the team pushes forward with Enoch's development, Popović believes it could be used to assess scripts such as Syriac, Arabic, Greek and Latin. Scholars who were not involved with the study were encouraged by the findings. Having both AI and an enhanced carbon 14 dating method allows a level of calibration across both methodologies that is helpful, according to Charlotte Hempel, a professor of Hebrew Bible and Second Temple Judaism at the University of Birmingham in the United Kingdom. 'The pronounced pattern seems to be that AI offers a narrower window within the Carbon 14 window,' she said via email. 'I wonder whether this suggests a higher level of precision, which would be extremely exciting.' The study represents a first attempt to harness AI technology to extend existing scientific knowledge from carbon 14 dating of certain manuscripts to other manuscripts, said Lawrence H. Schiffman, Global Distinguished Professor of Hebrew and Judaic Studies at New York University. 'To some extent, it is not yet clear whether or not the new method will provide us with reliable information on texts that have not yet been Carbon-14 dated,' he added via email. 'The interesting comments regarding revision of the dating of some manuscripts that may be expected through further development of this approach or new carbon-14 dating, while not new to this study, constitute a very important observation about the field of Dead Sea Scrolls in general.' Commenting on the computational aspects of the study, Brent Seales, the Alumni Professor of Computer Science at the University of Kentucky, said the approach taken by the authors seems rigorous even if the sample sizes are small. Using AI to completely replace carbon dating may be premature, however. '(AI) is a useful tool to incorporate into the broader picture, and to make estimates in the absence of Carbon-14 based on the witness of other similar fragments,' Seales wrote in an email. 'Like everything with machine learning, and like a fine wine, it should get better over time and with more samples. The dating of ancient manuscripts is an extremely difficult problem, with sparse data and heavy constraints on access and expertise. Bravo to the team for this data-driven contribution that takes a massive step forward.'
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Mountains are among the planet's most beautiful places. They're also becoming the deadliest
Jan Beutel was half-watching a live stream of Kleines Nesthorn, a mountain peak in the Swiss Alps, when he realized its cacophony of creaks and rumbles was getting louder. He dropped his work, turned up the sound and found himself unable to look away. 'The whole screen exploded,' he said. Beutel, a computer engineer specializing in mountain monitoring, had just witnessed a glacier collapse. On May 28, an avalanche of millions of tons of ice and rock barreled down the slope, burying Blatten, a centuries-old village nestled in the valley below. Local authorities had already evacuated the village after parts of the mountain had crumbled onto the glacier; a 64-year old man believed to have stayed remains missing. But no one expected an event of this magnitude. Successive rock avalanches onto the glacier increased the pressure on the ice, causing it to melt faster and the glacier to accelerate, eventually destabilizing it and pushing it from its bed. The collapse was sudden, violent and catastrophic. 'This one just left no moment to catch a breath,' Beutel said. The underlying causes will take time to unravel. A collapse of this magnitude would have been set in motion by geological factors going back decades at least, said Matthias Huss, a glaciologist at the Swiss university ETH Zürich. But it's 'likely climate change is involved,' he said, as warming temperatures melt the ice that holds mountains together. It's a problem affecting mountains across the planet. People have long been fascinated with mountains for their dramatic beauty. Some make their homes beneath them — around 1 billion live in mountain communities — others are drawn by adventure, the challenge of conquering peaks. These majestic landscapes have always been dangerous, but as the world warms, they are becoming much more unpredictable and much deadlier. 'We do not fully understand the hazard at the moment, nor how the dangers are changing with climate change,' said David Petley, an Earth scientist at the University of Hull in England. Snowy and icy mountains are inherently sensitive to climate change. Very high mountains are etched with fractures filled with ice — called permafrost — which glues them together. As the permafrost thaws, mountains can become destabilized. 'We are seeing more large rock slope collapses in many mountains as a result,' Petley told CNN. Glaciers are also melting at a terrifyingly rapid rate, especially in regions such as the Alps and the Andes, which face the possibility of a glacier-free future. As these rivers of ancient ice disappear, they expose mountain faces, causing more rocks to fall. There have been several big collapses in the Alps in recent years as ice melts and permafrost thaws. In July 2022, about 64,000 tons of water, rock and ice broke off from the Marmolada Glacier in northern Italy after unusually hot weather caused massive melting. The subsequent ice avalanche killed 11 people hiking a popular trail. In 2023, the peak of Fluchthorn, a mountain on the border between Switzerland and Austria, collapsed as permafrost thawed, sending more than 100,000 cubic meters of rock into the valley below. 'This really seems to be something new. There seems to be a trend in such big events in high mountain areas,' Huss said. Melting glaciers can also form lakes, which can become so full that they burst their banks, sending water and debris cascading down mountainsides. In 2023, a permafrost landslide caused a large glacial lake in Sikkim, India, to break its banks, causing a catastrophic deluge that killed at least 55 people. Last year, a glacial lake outburst caused destructive flooding in Juneau, Alaska — a now regular occurrence for the city. After two years in a row of destructive glacial flooding, Juneau is scrambling to erect temporary flood barriers ahead of the next melting season, the Anchorage Daily News reported this week. As well as melting ice, there's another hazard destabilizing mountains: rain. Extreme precipitation is increasingly falling on mountains as rain instead of snow, said Mohammed Ombadi, an assistant professor at the University of Michigan College of Engineering. His research shows every 1 degree Celsius of global warming increases extreme rainfall events by 15%. This pushes up the risks of flooding, landslides and soil erosion. Northern Hemisphere mountains will become 'hotspots' for extreme rain, Ombadi said. Heavy rainfall this month in Sikkim, a Himalayan state in northern India, triggered a series of landslides, killing at least three people. Images show deep muddy scars carved into the mountain, with buildings and trees obliterated. Scientists do have tools to monitor mountains and warn communities. 'There are fantastic instruments that can predict quite accurately when a rock mass (or) ice mass is going to come down,' Huss said. The difficulty is knowing where to look when a landscape is constantly changing in unpredictable ways. 'This is what climate change actually does… there are more new and previously unrecognized situations,' Huss said. These are particularly hard to deal with in developing countries, which don't have the resources for extensive monitoring. Scientists say the only way to reduce the impact of the climate crisis on mountains is to bring down global temperatures, but some changes are already locked in. 'Even if we manage to stabilize the climate right now, (glaciers) will continue to retreat significantly,' Huss said. Almost 40% of the world's glaciers are already doomed, according to a new study. 'We could have maybe avoided most of (the negative impacts) if we had acted 50 years ago and brought down CO2 emissions. But we failed,' Huss added. The consequences are hitting as the numbers of people living in and visiting mountains increases. 'We're just more exposed than we used to be,' he said. Ludovic Ravanel, an Alpine climber and geomorphologist who focuses on mountains' response to global warming, has a front line view of the increasing dangers of these landscapes. Mountains are the 'most convincing' hotspots of climate change, he told CNN. When he's focused on the science, he keeps his emotions at arm's length. But as a father, and a mountaineer, it hits him. 'I see just how critical the situation is. And even then, we're only at the very beginning.'


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8 hours ago
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Study: world glaciers on thin ice
A new study says nearly 40 percent of the total mass of the world's glaciers is doomed. CNN's Derek Van Dam looks at some recent events back that up.