Dinosaurs were the dominant land animals for 160 million years, making them one of the most successful groups of animals ever. The name dinosaur translates as terrible or wondrous lizards and they certainly evolved in a diverse range of sizes and shapes, from the gigantic plant-eating sauropodsto the quick meat-eating tyrannosaurs. They also sported an impressive array of body modifications including horns, scales and crests. So far, the remains of over 1,000 different dinosaur species have been identified from fossils though technically, birdsare feathered dinosaurs, meaning dinosaurs arent really extinct at all.