The Ankylosaurus co-existed with the Tyrannosaurus Rex so, like the Triceratops, it had to evolve some pretty spectacular defenses. Indeed, it had as much in common with a Sherman tank as it did its fellow herbivores. Its impenetrable suit of armor worked like a built-in Bat suit, with even its eyes protected by horned ridges. For extra measure, it sported a giant club on the end of its tail, capable of breaking the bones of attackers. Only true thrill-seeking predators would ever consider messing with this walking fortress. Artwork by SharkeyTrike.