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Thursday, October 28, 2010

Photo: Upright Walking Started in Trees, Ape Study Suggests


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Ancient apes that traveled the treetops on two legs—such as modern-day orangutans do—may have led to upright walking in humans, experts claim.

Yet a prevailing theory still maintains bipedalism evolved after our ancestors left the trees and began living in the African grasslands.

Photograph courtesy SKS Thorpe