Pet rocks had their day. Parachute pants weren't in vogue for long. The Tamagotchi craze lasted less than a year. But some dopey ideas have the life expectancy of bedbugs. Take, for instance, "Tooth ...

Losing a tooth is a strange childhood milestone. But the Tooth Fairy, that familiar nighttime visitor, didn't just appear out of nowhere with glitter and dollar bills. Her story is stitched together ...