National Geographic : 2009 Jul
Indiana has Madagascar hissing roaches (above) that pull tiny tractors bearing flags of rival univer- sities without a whit of training, brags Purdue University roach wrangler Tom Turpin. And who can resist group hypnosis? Iowa volunteers go catatonic (below) at the snap of hypnotist Ron Diamond's fingers. Next he may tell them to wiggle or scratch. "I create an environment that lets the subcon- scious work, then make suggestions," Diamond says. "The mind does wonderful things, if we let it."