Friday, June 1, 2007

Did upright walking start in trees?

WASHINGTON - Maybe walking upright on two legs isn't such a defining human feature after all. Scientists who spent a year photographing orangutans in the rain forest say the trait probably evolved in ancient apes navigating the treetops long before ancestors of humans climbed to the ground - a hypothesis that contradicts science museums the world over.

Guesser: Robin Crompton of the University of Liverpool

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