Add this to the list of published ideas about the selective advantages of bipedalism.
In a PLOS One article Carrier reports that human subjects deliver more powerful punches from a bipedal (orthograde) posture than from a quadrupedal (pronograde) posture. This might suggest that forelimb fighting among males competing for females is a selective pressure for bipedalism.
Maybe we can call it the Rocky Hypothesis?
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