(ScienceAGoGo) While archaeological and genetic evidence suggest that Homo sapiens originated in Africa around 200,000 years ago, it is more difficult to identify when modern human behaviors emerged. Intriguingly, recent archaeological excavations in southern Africa have shown that technological innovation, linked to the emergence of culture and modern behavior, took place relatively suddenly on more than one occasion. Now, an international team led by researchers from Universitat Autonoma de Barcelona has linked the emergence of tool-making and agriculture to climate change in sub-Saharan Africa.

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