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      Upright Walking Began 6 Million Years Ago, Thigh Bone Comparison Suggests

      Posted by Sandyenglish from Science Daily

      A shape comparison of the most complete fossil femur (thigh bone) of one of the earliest known pre-humans, or hominins, with the femora of living apes, modern humans and other fossils, indicates the earliest form of bipedalism occurred at least six million years ago and persisted for at least four million years. William Jungers, Ph.D., of Stony Brook University, and Brian Richmond, Ph.D., of George Washington University, say their finding indicates that the fossil belongs to very early human ancestors, and that upright walking is one of the first human characteristics to appear in our lineage, right after the split between human and chimpanzee lineages. Their findings are published in the March 21 issue of the journal Science.

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      Why Humans Walk On Two Legs

      Posted by Sandyenglish from Science Daily

      A team of anthropologists that studied chimpanzees trained to use treadmills has gathered new evidence suggesting that our earliest apelike ancestors started walking on two legs because it required less energy than getting around on all fours.

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    Sandyenglish

    Member since Jul 2008

    New York


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    okami

    Member since Jul 2008

    former US Marine, retired police; now alternately protected and terrorized by gangs of cats

    Commerce


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