The first people to discover Diplodocus fossils were Earl Douglass and Samuel W. Williston in the year 1877.
The Diplodocus had blunt teeth that were useful for nipping at and stripping foliage.
The head of the Diplodocus was around 2 feet long and the nostrils were placed on top of the head.
The tail of the Diplodocus had around 80 vertebrae in it, and was whip like in appearance. It was often used as a weapon against enemies.