million years ago. That's a solid 54 million years!
Dinosaurs dominated the land fauna of the entire planet in the Jurassic period. The largest dinosaurs of the time — in fact, the largest land animals EVER— were the gigantic long necked sauropods. Other herbivorous dinosaurs of the Jurassic included the plated stegosaurs. Predatory dinosaurs of the Jurassic included fearsome carnosaurs such as Allosaurus, small, fast coelurosaurs, and ceratosaurs such as Dilophosaurus. The Jurassic also saw the evolution of the first birds which paleontologists believe are LIVING dinosaurs. So the dinosaurs never went extinct.. their feathered descendants are in the trees right outside your window. This pattern makes awesome wallpaper!