Humans almost became two species

Ancient humans started down the path of evolving into two separate species before merging back into a single population, a genetic study suggests.

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Report: Human Beings Were Nearly Extinct 70,000 Years Ago

Human beings may have had a brush with extinction 70,000 years ago, an extensive genetic study suggests. The human population at that time was reduced to small isolated groups in Africa, apparently because of drought, according to an analysis released Thursday. The number of early humans may have shrunk as low as 2,000.

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