The Megatherium, which are now extinct animals, were some of the largest ground sloths to roam the planet. They were half the size of modern day elephants, and had terrifying claws and teeth. Even though they mainly fed on leaves of trees and bushes, their appearance wasn’t any less terrifying. They roamed the lands of South America during the Cenozoic Era, which began 65.5 million years ago. Interestingly enough, their name means “Great Beast from America.” We can agree that they looked like beasts (Britannica).