Dictionary of Human Evolution and Biology

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Continent-sized former land bridge spanning the Bering Strait between present-day Alaska and Siberia; formed during the Cretaceous period. It persisted into the early Tertiary, and was exposed intermittently during glacial maxima of the Pleistocene epoch. Currently under the Bering Sea, this former land bridge permitted exchanges of biota including the migration of humans from Asia into North America. During the last great glacial period this land bridge was about 1200 miles wide. Aka Bering land bridge.

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