Still Waters Posted December 2, 2016 #1 Share Posted December 2, 2016 "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 2 Link to comment Share on other sites More sharing options...
brlesq1 Posted December 3, 2016 #2 Share Posted December 3, 2016 So Lucy did both. Interesting. Link to comment Share on other sites More sharing options...
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