The Diplodocus was a herbivorous sauropod dinosaur that lived during the Late Jurassic period. It was a member of the Diplodocidae family and could reach lengths of up to 90-100 feet. Diplodocus had a long, slender neck and tail, and a small head with peg-like teeth. It was a quadrupedal animal, meaning it walked on four legs, and had a large number of small, pointed teeth that were good for biting off leaves and branches.

Diplodocus had a long whip-like tail that it likely used for defense against predators. Fossils of Diplodocus have been found in western North America, specifically in Colorado, Wyoming, and Utah. Its name meaning, “double beam” is due to the dual layer of bones on its spine.