Copyright ImageClick to View A reconstruction of the skeleton of Australopithecus sediba, center, stands next to a modern human female, left, and a male chimpanzee. (Lee R. Berger/University of the Witwatersrand/AP) Being four-legged has its perks. As a quadruped, your center of gravity is lower,…
[Image by Ryan Somma via Flickr Creative Commons]
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