Describes what is known about the plant-eating dinosuar, Diplodocus. Includes physical characteristics, environments, its predators, and how we know so much about them.

A changing world -- A very long neck and tail -- Diplodocus babies -- Finding food -- A leafy diet -- Trapped -- The Diplodocus body -- Digging up Diplodocus -- Diplodocoids -- The evolution of dinosaurs -- A dinosaur's family tree.