10 Horrifying Animal Facts You Really Don't Want To Know

3. Cockroaches Can Live For Weeks Without Heads

It's often said that cockroaches are the most likely survivors of a nuclear war, and if that's the case we'd rather be dead. Anything that can do this is evidently the creation of Satan himself. Lop the head off a cockroach, and a week or two later it will still respond to stimuli by wiggling its legs. It's true - scientists have actually studied it. But how does it work, other than evident black magic? Turns out, cockroaches have open circulatory systems, so the heads aren't that important to how the demon functions, since they won't bleed out. They'll just dehydrate eventually, or start to mould. Shudder.