BBC NEWS | Science/Nature | Ancient drought 'changed history': "Ancient drought 'changed history'
By Roland Pease
BBC science unit, San Francisco
Drilling platform (Scholz)
The sediments are an archive of past climate conditions
Scientists have identified a major climate crisis that struck Africa about 70,000 years ago and which may have changed the course of human history.
The evidence comes from sediments drilled up from the beds of Lake Malawi and Tanganyika in East Africa, and from Lake Bosumtwi in Ghana."
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