![]() ![]() ![]() ![]() Sedimentary eDNA samples are inherently difficult to examine because the DNA fragments come from numerous plants, animals, and microbial species. so their ability to kill animals is very limited,” he said. “I have to clarify that this is the prehistory human in a very small population, and they don't have guns. It turns out that mammoths survived until 3,900 years ago, overlapping with humans for 20,000 years. When Wang analyzed the mammoth eDNA from the sediment, he made a surprising discovery. ![]() “ are in different layers of the sedimentary profile, and we retrieve the DNA from the different layers, which represent different age frames,” said lead author Yucheng Wang, a research associate in the Department of Zoology at the University of Cambridge and a visiting postdoctoral researcher at the University of Copenhagen.īased on ancient DNA preserved in mammoth fossils, Wang and others previously believed that woolly mammoths became extinct around 10,000 years ago, possibly because of their interactions with humans. 3 By analyzing eDNA sequences collected from multiple sites, the scientists reconstructed the ecological history of the Arctic over the last 50,000 years. In a recent study published in Nature, led by Eske Willeslev from the University of Cambridge and the Lundbeck Foundation GeoGenetics Centre, proposed climate change as the main culprit, not humans. In recent years, scientists turned to environmental DNA (eDNA) in permafrost and lake sediments across the Arctic to dig deeper into the reasons behind mass species extinction. ![]()
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