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What happened 50,000 years ago?

May 8, 2014

One of the great mysteries of pre-history is what happened 50,000 years ago, when some humans left Africa, and spread behavioral modernity across the globe. Populations that had long been static, presumably, soon began acting like modern people. What mix of biology and culture caused that? Razib Khan has an interesting post pointing out that there was a similar Austronesian expansion.

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