Here are underwater frame-by-frame shots of Michael Phelps razor-edge victory in the 100-meter butterfly, touching the wall .01 seconds before his Serbian opponent. (The day after the event, I heard an interview with the official Olympics timekeeper, who pointed out that the human eye unaided can only see things at .1 second intervals–so without photography and the touch pad it would have been impossible to tell who won.)
BLOGS: Justin Taylor