Usain Bolt, as winner of the 100 meter dash, receives the title "the world's fastest man." It carries a mystique unlike any other. Nobody cares about the world's best hammer thrower, or the world's best trampoliner. But running is different. Running speaks to something essential—no tools or equipment needed, nothing but a biped and a finish line. And yet, what Usain Bolt does might be the least primal, most unnatural thing of all. More »