The top 3 dinosaurs were the Tyrannosaurus, known for its powerful jaws and teeth and reputation as one of the most feared carnivores; the Stegosaurus, a relatively calm herbivore with a small brain the size of a tangerine; and the Triceratops, identifiable by its three horns and extremely strong skull, though it was still an herbivore that only wanted to eat plants and protect its family.