Denisovan: Mysterious species of prehistoric man conquers Asia



The first great discovery came in 2010, when it was discovered that an ancient finger bone from the Denisova cave in Siberia fell on a hitherto unknown species of archaic man. Now, two studies published in Science confirm that the mysterious “Denisovans” were widespread in Asia by the time the first Homo sapiens began to arrive. One study is the first discovery of Denisovans’ genetic material outside of Siberia. located high on the Tibetan Plateau, almost 30,000 kilometers from the now famous Denisova Cave. “Every year I said that this year we will find [γενετικό υλικό]. But a decade has passed since then, “said Svante Paabo, the famous researcher who first identified the Neanderthals’ genetic sequence, on the Science website. For the Buddhist monks in the area, the cave is sacred and the excavation had to be carried out carefully so as not to “desecrate” the site. the very sediments of the cave. It was mitochondrial DNA (mtDNA), which probably ended up in the cave floor through urination or defecation. Traces of genetic material were found in layers dating to exactly 100, 65 and 45 thousand years ago, around the time Previous studies had revealed that modern human populations in Asia and Europe carry Denisovan genes, indicating that the two related species have crossed at some point in their history. The widespread spread of Denisovan The second study in Science, in which Paabo and the team of Dongzhou Zhang of Lanzhou University in China examine two bones of a modern human from Mongolia and the Beijing region. This is the oldest modern human DNA found to date in Asia. , aged 34,000 and 40,000 years respectively. Both bones were found to contain genes Denisovan, a remnant of an intermingling episode estimated to have occurred 50,000 years ago. But the strange thing is that these genes are different from the Denisovan genes detected in the Aborigines of Australia and the New Guineans. According to the researchers, these differences indicate that modern man crossed with two different populations of Denisovan, one in mainland Asia and a second in Southeast Asia. In combination, the two new studies confirm that our now extinct relatives had conquered much of And, in the case of Tibet, the mysterious species left behind an important legacy: a gene called EPAS1 that improves the transport of oxygen from the blood and thus allows living at high altitudes. The Denisovans may have disappeared, part But information about the missing relative may be revealed in the same Tibetan cave, with researchers hoping to find bones that contain his entire genome. Follow it on Google News and be the first to know all the newsSee all the latest News from Greece and the World, at



Source link

Leave a Reply

Your email address will not be published. Required fields are marked *