It turns out that human beings and Neanderthals had sex since older than expected
The cross between modern human ancestor Homo sapiens and
Ancient gene flow from early modern humans into Eastern Neanderthals: Nature: Nature Publishing Group
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature16544.html
Humans and Neanderthals had sex a lot earlier than scientists thought | The Verge
http://www.theverge.com/2016/2/17/11021014/neanderthals-sex-humans-100000-years-ago-interbreeding
The findings came from an analysis of DNA in the bones of Neanderthals and Denisovans . The Denisovans belong to a group close to the Neanderthals, a tribe that evolved independently, diverging about 380,000 years ago.
Until now, Homo sapiens, the human origin, was thought to have traveled around the world starting about 60,000 years ago from the continent of Africa. During the course of its spread, it was discovered that Homo sapiens had repeatedly mated with Neanderthals, who were still alive at the time. This is supported by the fact that the genome of modern humans contains between 1% and 4% of DNA derived from Neanderthals. In addition, this DNA is said to be the cause of symptoms such as depression and nicotine addiction that humans have.
Neanderthal and modern humans were crossing, revealed by genetic research-gigazine
According to the chronology of conventional theories, it is said that the start of the mixed race between Homo sapiens and Neanderthals is more modern than 60,000 years ago, but in this study it is the opposite We have successfully traced the history of mating in terms of DNA transfer from Homo sapiens to Neanderthals .
The research was conducted by a research team by Sergi Castellano, an evolutionary biologist at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany. Castellano and colleagues analyzed the differences between the Neanderthal bones found in Siberia and the DNA in Denisovan bones that diverged from Neanderthals about 380,000 years ago. They found that DNA fragments from Homo sapiens found in Neanderthal DNA were not found in Denisovans. This means that Neanderthal DNA was crossed with Homo sapiens DNA from 380,000 years ago, an event close to modern times.
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In addition, Castellano and colleagues compared chromosome 21 in the genomes of Siberian Neanderthals and two other Neanderthals found in Europe. As a result, it was found that the latter DNA did not contain DNA derived from Homo sapiens. As before, this indicates that the cross between the Siberian Neanderthals and Homo sapiens occurred in a time after the divergence of the European Neanderthals, which diverged about 110,000 years ago Is believed to be
Evolutionary biologist Sarah Tishkoff rates the presentation as 'a great change in the way we think about the history of human evolution.' However, on the other hand, in addition to mentioning that they may have overlooked a similar difference in parts other than chromosome 21 in this comparison, too much is clear about the history of mixed blood itself Point out that it is not. According to Tishkoff, the Neanderthals this time used individuals found in Siberia, but the actual crossing of Homo sapiens and Neanderthals was done in a southern region closer to Africa, It seems necessary to conduct research on more specific facts.
Although the results of this research have been recognized in terms of updating the content of biological evolution theory, it is also true that more issues were found. It seems difficult to clear all the mysteries of the long ago, but touching the evolutionary process that is revealed little by little appeals to the instinct part as a living thing. I feel like that.
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