Next airing Tue Mar 27, 5 p.m. ET

Freaks on Land

Some creatures are so bizarre they defy imagination. Komodo dragons use a sixth sense, a smell-o-vision from the roof of their mouth to seek out prey, and cannibal black widow spiders sense movement with their feet. The female praying mantis bites off her mate's head during sex while the horned lizard shoots blood out of its eyes in self-defense. And hedgehogs will munch on cigarettes and bathe in oil in order to be crossed off the menu for predators.