NewScientist.com news service
Roxanne Khamsi
Our ancestors may have succeeded in migrating out of Africa thanks to a shift towards wetter weather that made it easier to find food while on the move.
Sediment samples recently taken from the bottom of Lake Malawi in Africa reveal that the continent experienced a series of long-lasting droughts that ended 70,000 years ago – around the same time that Homo sapiens is thought to have started exiting the continent for Europe and Asia.
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