Important, previously unrecognized genetic changes common to all ancient and modern Homo sapiens spread in Africa more than 300,000 years ago, a new study finds.
After that, the same investigation concludes, human evolution experienced a regional twist. Ancient southern Africans evolved an impressive array of genetic tweaks largely independently of humans in other parts of the continent. That process occurred from around 300,000 years ago until the last few millennia, researchers report December 3 in Nature.
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