Giant Prehistoric Animals With Modern-Day Relatives
Despite its name, deinosuchus was not a dinosaur, but a crocodilian. In fact, it could have preyed on dinosaurs who ventured too close to its watery home. The glyptodon, meanwhile, was well over 3 meters in length, and was roughly the size of a small car.
Check Out This Month's Most Popular Topic
Key Facts In This Video
Megatherium was a prehistoric elephant-sized ground sloth. (1:23)
Predatory "terror birds" were taller than ostriches and weighed about half a ton. (3:46)
Nuralagus rex was an ancient rabbit that weighed more than 23 kilograms. (6:43)