When you live in the desert, you evolve to eat what's there. Watch this hardcore dromedary munch down on a prickly pear cactus with 6-inch spines! And you thought Captain Crunch made your mouth sore. Apparently, camels have protrusions inside their mouths containing keratin that are tough and flexible like plastic that enables them to deal with just about any food source they come across. They are also ruminants, so everything gets chewed up more than once. -via Boing Boing