Dinosaurs are, or were, large reptiles that were freakin' awesome and ruled the Earth for a grand total of 160 million years! If you still have no idea what I'm talking about, picture wingless dragons that didn't breathe fire and actually existed. Watch Jurassic Park. For heaven's sake, EVERYBODY knows what dinosaurs are! If not, check out the Wikipedia page, then watch Jurassic Park, and get a subscription to Prehistoric Times, and then it will become obvious that dinosaurs are only exceeded in awesomeness by dragons, which weren't real.