National Geographic : 2000 Apr
ANDRE'S HAND CUPPED THE SNOUT, ALMOST CARESSING IT. "I'm not missing any fingers," says Andre Hartman, co-owner of a South African shark diving operation, of this photo (left). "I've got two wrapped around its nose and the others in front." Such gentle touches on a sensitive area can make the animal rise open-jawed, swoon, and slip back into the water (above). Scientists don't know exactly why this happens, but it likely involves the electro receptor pores that pepper the snout.