Past studies of human genetics have proposed the theory that modern humans originated from a single population in Africa. But a new paper, published last week in the journal Nature, put this idea to the test—and concluded it doesn’t hold up.
The paper relies on modeling using the genomes of 290 living people from southern, eastern and western Africa. The findings suggest that modern humans descended from at least two groups of ancient humans that were closely related and mixed genes on occasion, writes Live Science’s Charles Q. Choi.



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