Period: The Stegosaurus lived in the late Jurassic period, about 156-140 million years ago.

Habitat: Stegosaurus was found in Western North America, Western Europe, and South Asia. It lived in a hot, dry environment.

Diet: Stegosaurus was a herbivore (plant eater). It ate shrubs and bushes.

Size: The Stegosaurus was 26-30 feet long (8-9 m) and about 9 feet (2.75) tall.

Description: The Stegosaurus weighed about 6,800 lb. (3,100 kg). The Stegosaurus' brain was only the size of a walnut. A Stegosaurus' tooth was 7 mm long. The Stegosaurus' rear legs were straighter than its front legs. The Stegosaurus' many plates were embedded with a network of blood vessels. The Stegosaurus' probably traveled in herds.