10. Polar Bear -
As with most items on this list, it’s the cute ones that you’ve got to look out for. The Polar Bear is the world’s largest carnivore. It has no natural predators, and will eat anything that is even slightly meaty, including other polar bears or YOU, for that matter. Sure, they aren’t known to kill humans, but that’s just because there aren’t many wandering around in their neck of the woods to kill.