The best explanation for the archaic genetic signal in African populations (YRI, MSL, LWK, GWD, ESN) is a scenario that assumes admixture from an unknown archaic hominin lineage that split from the common ancestor of Homo sapiens and Neanderthals between 600,000 and 1,500,000 years ago. This population contributed between 5% and 19% of its DNA to the ancestors of modern humans (the Luhya population of Kenya has individuals with a record 31% of their genome descended from an archaic hominid), and admixture took place about 50,000 years ago, after the separation of non-African populations. Models that assume admixture from Neanderthals, Denisovans or populations close to Homo sapiens cannot explain the data. In addition, some of the archaic alleles may have been preserved and perpetuated by natural selection. This study significantly enriches our understanding of the genetic structure of early human populations and indicates that African genomes contain a trace of a mysterious extinct hominin. In simple terms: in a period of about 660,000 - 1,500,000 years ago, a very primitive hominid lived in Africa - the ancestor of all humans erectus / ergaster / habilis or heidelbergensis. 5 million years before that, he had the last common ancestor with the chimpanzee. Through evolution, some of his descendants separated and began a common evolutionary lineage for HUMANS, Denisovans, and Neanderthals. They evolved together for another 100,000 to 600,000 years, until, in the neighborhood of 700,000 years ago, the Denisovans separated from the population and moved out of Africa. After another 100,000 years, the main human line separated from the Neanderthals, who left Africa. At this point we have 600,000 BC - separated Denisovans, Neanderthals, and the main line of humans (protoplasts, but direct ancestors). At the same time, a second group of descendants of the same common ancestor from the period 660k-1500k, evolved separately in their own right throughout this period. Very possibly changing very little in principle, being in the same area, similar conditions. Not mixing genes with anything because they are consistent and almost unchanged for the past 600,000 years. Another 500,000 years pass, so we have about 100k - 200k years BC. Denisovans and Neanderthals have colonized most of the continents. A population of early modern humans set off from Africa - they are said to be the common ancestors of all humans. Now the most important about 45,000 - 55,000 years ago: homo saspiens is already walking 100k years outside of africa, while in africa this archaic hominid evolving separately already then 660,000 - 1,500,000 years old, begins a massive mixing of genes with all homo sapiens living in sub-Saharan africa - AND ONLY WITH THEM! He did not pass any genes to populations that had already left africa, such as later white people. It is possible that it was heidelbergensis or erectus. Thus, 50,000 years ago the first blacks arise, as a hybrid of an ultra archaic hominid and an almost modern homo sapiens - members of ZERO populations, but a faction that stayed in africa. Thus, we supposedly all have common ancestors 100k - 200k years ago, but yet up to 31% (Luhya Kenya - record) of the WHOLE DNA CODE of blacks evolved separately for over a MILLION years. We are up to 6million years away from chimpanzees. This is very important, we are talking about the proven fact that, on average, from 2 to 19% of all genes, of each Negro comes directly from the creature that these genes evolved separately for up to 1.5million years. Some Kenyans have a record 31% of genes derived from this hominid, at the same time all other people except blacks have practically 0% of its genes. The Yaruba or Nigeria also high, they reach 25%, averaging 10-19% in the entire population. We are talking about the whole DNA, not a fragment, a snippet. Of course, it's hominid DNA, so even though it evolved separately it continued within the same species - so they were able to mix / mingle in early homo sapiens. Up to 31% of genes coming from a hominid doesn't mean they share 69% percent of genes with us, because more than that is what a horse has. It means that within the same species, they evolved separately, never once mixing genes with us. These genes, of course, that they are different from ours, but IN FRAME, within the limits set by nature for one species. At the same time, it should be noted that maybe half a million years longer and already the window of lineage merger could be closed forever and there would be no blacks.