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The Mystery of Why Our Ancestors Left Africa

The Atlantic

How might climate variability have shaped H. erectus? The marine geologist and climate scientist Peter de Menocal, the director of the Woods Hole Oceanographic Institution, in Massachusetts, has studied changes in climate 1.9 million years ago using layers of sediment buried beneath the ocean floor off the coast of East Africa. He points out that “the period of around 2 million years [ago] is one of the major junctures in human evolution.”