Dinosaurs aren't all big and scaly. The more fossils they find, and the closer they examine them, the more scientists realize how diverse these animals were. Sure, some were massive. Some took to the air on giant wings. But lots more scampered around on the ground chomping on vegetation. And many more than previously thought may have sported feathers, perhaps using them to impress a mate with a bit of tail-shaking action the way peacocks do today.