This guy was WAY cooler than his bigger meathead cousin T. rex — literally, because it was the first large carnivorous dinosaur to be discovered on the continent of Antarctica.* Its actual name is Cryolophosaurus, or "frozen crested lizard," but it's nicknamed Elvisaurus because of that nifty pompadour that, rumor has it, actually inspired the King. Bonus: the paleontologist who discovered it was named Will Hammer. Hardcore.

*Obviously Antarctica wasn't a frozen wasteland when Elvisaurus was clomping around in the early Jurassic, but lemme have this one, okay?