How is that bipedalism led to the developement of speech in humans?
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The evolution of human bipedalism, which began in primates about four million years ago,or as early as seven million years ago with Sahelanthropus, has led to morphological alterations to the human skeleton including changes to the arrangement and size of the bones of the foot, hip size and shape, kneesize, leg length, and the shape and orientation of the vertebral column. The evolutionary factors that produced these changes have been the subject of several theories.
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