When mapping genomes to track the evolution of human DNA, the researchers discovered the surprising element: all non-African people have traces of DNA from another ancient human race. .
It is estimated that about 6 billion people on Earth with a non-related ancestor to Africa will carry 1-2% of the genes of Neanderthals, close relatives of our Homo Sapien species. As for East Asians and Oceania, they will have a small amount of the genes of the Denisovan breed, another close relative of Homo sapien.
New research is posted on Science Advances recognizing that early humans in Africa mated with ancient human species – relatives (now extinct) with Homo sapien. Mating with others begins to emerge when our Homo sapien ancestors leave Africa, seeking new lands. It was then that human ancestors got the genes of Neanderthals and Denisovans.
From here, we have new discoveries. Previously, genetic research on modern humans showed that a major migration event 100,000 years ago gave our genes traces of species other than Homo sapien.
We can still confidently assume that the majority (between 92% and 98%) of people living outside Africa are descended from immigrants from Africa 100,000 years ago. But now, new evidence shows that the remaining% of people from an ancient ethnic group, left Africa hundreds of thousands of years before the time of migration.
In my native Africa, what happened?
The skull of Homo rhodesiensis, an ancient species that became extinct.
Thanks to the well-preserved amount of ancient genes in Eurasia’s cold and dry climate (as opposed to the humid heat of Africa), we have found more traces of Homo sapien breeding to other species.
But until now, we have more evidence of the relationship between human ancestors in the cradle of humanity, Africa. Research published in 2017 of 16 ancient DNA samples found in southern Africa, about people who have lived here for the past 10,000 years has revealed a mystery. It turns out that the ancient African community was complex, and not just the only human race that found its way out of Africa 100,000 years ago.
Earlier this year, new research on genetic samples involving 4 ancient people supported what the 2017 scientific report pointed out. Combining the results, we see that many human species exist in different clusters across Africa, and the genetic traces of many of them still exist in modern Africans.
Besides, we have discovered the possibility of a strange gene mixed with the ancient Homo sapien population living in Africa. The new study provides further evidence of the existence of a mysterious ancient human race, data showing that 6-7% of people living in West Africa have a mysterious ancestor, not the Neanderthal or Denisovan genes. These gene samples do not match every human genetic map we have.
The skulls of modern humans (left) and Neanderthals (right).
Most likely, this mysterious ancient species lived separately from Homo sapien and Neanderthal around 360,000 to 1.02 million years ago. This discovery is so surprising that scientists are extremely cautious, unable to draw conclusions. They want to learn more about ancient DNA patterns and the diversity of humans in Africa itself.
This is yet another study that gives scientists a headache; Modern humans are the product of millions of years of evolution and hundreds of thousands of years of hybridization among many different human species, and it is likely that we have some more ancient ancestor that science does not know.
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