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3 answers

Big brains and bipedalism-- we are the only primates that are bipedal pretty much all the time, which is hypothesized to have freed up our hands and allowed us to develop more complex tool use and habits.

2007-01-21 23:53:20 · answer #1 · answered by kiddo 4 · 0 0

Bipedalism

2007-01-21 16:56:34 · answer #2 · answered by tentofield 7 · 0 0

wouldn't this question better belong to the Biology category?

2007-01-21 16:54:43 · answer #3 · answered by Anonymous · 0 0

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