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Why do humans swing their arms as they walk? Riddle answered

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Why do humans swing their arms as they walk? Riddle answered

#1

Post by dpurp » Wed, Jul 29, 2009, 9:53 PM UTC

Why do humans swing their arms as they walk? Riddle answered
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Re: Why do humans swing their arms as they walk? Riddle answered

#2

Post by RiderOfGiraffes » Wed, Jul 29, 2009, 10:46 PM UTC

Submitted 5 hours earlier: http://news.ycombinator.com/item?id=730352

More discussion there.

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