Tools Suggest Earlier Human Exit From Africa

A cache of stone tools found on the east coast of the Arabian Peninsula has reopened the critical question of when and how modern humans escaped from their ancestral homeland in eastern Africa.

The present view, based on both archaeological and genetic evidence, holds that modern humans, although they first emerged in Africa some 200,000 years ago, were hemmed in by deserts and other human species like Neanderthals and did not escape to the rest of the world until some 50,000 years ago.

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