Between Two Worlds

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.)