Diplodocus was a 80 foot long diplodocid sauropod.
Diplodocus lived during the late Jurassic Period in what is now North America. At 87 feet long, when adults, they were invincible to predators, but when juveniles they were and could be hunted by Allosaurus.
They were huge animals that had probably had small spines accross their back.
In Other Media
In Walking with...
Diplodocus was the main character in walking with dinosaur: Time of the Titans. It folowed the life of a young sauropod calf until it grows until its 10 years old. It was attacked by allosaurus during its entire life.