What makes a mysterious disappearance even more intriguing? When baffling clues are left behind — or even more tantalizingly, when they surface again, months or years after the fact. Here are eight head-scratchingly compelling tales of people who vanished... and the weirdest theories they spawned.
Scott Fahlman, computer scientist and typography genius, invented the smiley emoticon. But today's ubiquitous smiley had a few precursors. One involved a tongue, and the other involved Ambrose Bierce. Pick your favorite.