For what it's worth, this first appeared in slate [1] and is a few months old. It showed up in HN 86 days ago [2] [1] http://www.slate.com/articles/sports/spor

For what it's worth, this first appeared in slate [1] and is a few months old. It showed up in HN 86 days ago [2] [1] http://www.slate.com/articles/sports/sports_nut/2012/06/long_distance_running_and_evolution_why_humans_can_outrun_horses_but_can_t_jump_higher_than_cats_.html http://www.slate.com/articles/sports/sports_nut/2012/06/long... [2] http://news.ycombinator.com/item?id=4073013 http://news.ycombinator.com/item?id=4073013