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Why do humans swing their arms as they walk? Riddle answered | Dark Hacker News

Why do humans swing their arms as they walk? Riddle answered(news.yahoo.com)

7 points by dpurp 16 years ago | 1 comment

RiderOfGiraffes 16 years ago |

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

More discussion there.