0 a very large dinosaur that ate plants and had four legs, a very long neck and tail, and a small head:
Diplodocus reached a length of 28 m but weighed only 10 tonnes, whereas Apatosaurus was shorter at 25 m, but weighed 30 tonnes.
Marsh put the wrong skull on a skeleton of Apatosaurus and declared it a new genus, Brontosaurus.
The museum houses a 60-foot-long metallic Apatosaurus skeleton.
