12. Hippopotamuses

Hippos are territorial and huge (they can get up to 6,000 pounds!) so naturally, they pose a threat to humans. About 500 deaths per year are caused by these “river horses” (as their name translates in Greek). The attacks are sometimes because humans appear to pose a threat to hippo calves, and this makes the hippo moms get very angry.

They’ve trampled people, pulled them into lakes, tipped over boats, and even bitten heads off. Unfortunately, since they’ve lost a lot of habitat, they’re forced to live closer to humans. But humans have killed plenty of them, too, and George Washington even had a set of false teeth made out of their chompers (not wood, as the myth goes).