See exactly how fast Usain Bolt is compared to past champions

In case you didn't already notice, Jamaican runner Usain Bolt is really, really fast. But how fast? The clever folks at the New York Times compared his last sprint to the average speeds of medalists from Olympics past, revealing exactly how much of Bolt's dust they'd be eating if they went up against him in the 100-meter dash. Still, the times are all relative — even with all the advances in running technology since the Olympics began, the difference between today's athletes and the fastest humans of the 19th century is only about three seconds. [Source]