University of Zurich (@uzh_en) 's Twitter Profile
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linkhttp://www.uzh.ch/index_en.html calendar_today10-01-2012 15:17:51

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Chimpanzees, like humans, must contend with a confined bony birth canal when giving birth. In humans, the problem was exacerbated by our unique form of upright walking since this led to a twisting of the bony birth canal. The “obstetrical dilemma” therefore evolved gradually over

Chimpanzees, like humans, must contend with a confined bony birth canal when giving birth. In humans, the problem was exacerbated by our unique form of upright walking since this led to a twisting of the bony birth canal. The “obstetrical dilemma” therefore evolved gradually over