Harold Doc Edgerton's stop-action stroboscopic flash photographs - the spiked diadem of a milk-drop splash, the path of a bullet, a hummingbird's wings - are considered wonders of both art and science. For decades these amazing images poured out of MIT's Strobe Alley, Doc's name for his lab rooms and the corridor into which so many of his experiments seemed to spill. Previous accounts of this work have focused on the artistic quality of these images. Seeing the Unseen differs in its dual focus on the life and the science of this teacher/entrepreneur whose native curiosity led him to fashion imaginative means of stopping time to investigate the details of natural phenomena.