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Human ancestor 'Lucy' was a tree climber, too


Still Waters

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"Lucy," an early human ancestor that lived 3 million years ago, walked on two legs. But while she had her feet firmly planted on the ground, her arms were reaching for the trees, a new study shows.

High-resolution computed X-ray tomography (CT) scans of long bones in Lucy's arms reveal internal structures suggesting that her upper limbs were built for heavy load bearing — much like chimpanzees' arms, which they use to pull themselves up tree trunks and to swing between branches.

http://www.livescience.com/57068-human-ancestor-lucy-climbed-trees.html

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