James Metcalfe
Perhaps surprisingly, this massive beast is the only inclusion on this list to not actually be a carnivore. Resembling a sloth in its make up, the Megatherium was the size of a fully grown elephant that roamed the Earth during the Ice Ages. In size, it was only really dwarfed in its time by the giant Mammoth and, only dying out as late as 10,000 year ago, it is more than likely that the Megatherium interacted with humans. The Megatherium’s terror came from its ability to stand up on its hind legs, making it look far more fierce, and show off its impressive claws.
