Diplodocus is one of the most famous long-necked dinosaurs. At over 88 ft long from the tip of its snout to the end of its whip-like tail, Diplodocus is as long as three buses. This ground-shaking plant eater occupied North America during the Late Jurassic, about 153 million years ago.Scientific Name: Diplodocus carnegiiCharacteristics: Diplodocus was a plant eater that had a tiny skull relative to the size of its giant body. It had simple, peg-like teeth for stripping leaves, a long neck, and an especially long whip-like tail. Diplodocus walke