The diplodocus was a very very very large plant eating dinozaur who lived very very very long time ago. He has a very long neck whitch helped him to eat leaves from large trees, because in his era all plants was more bigger as the plants of our days. These animal's was lived in big groups, to defend themself's agaist predators. He lived 147-150 years ago, somewhere in the actual America.
Hos lenght was about 25 meters and the weight was aproximely 10-16 tons.