Bit by bit, his back uncurls and straightens until all of a sudden there is he, upright, truly a man.
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Prev: If the small-brained australopithecines were not toolmakers, what evolutionary advantage did they gain by walking upright?
Next: Moreover, even though humans have been upright for millions of years, our feet and back continue to struggle with bipedal posture and cannot easily withstand repeated strain imposed by oversize limbs.
