People once called this 70-foot-long plant eater Brontosaurus.
Then scientists, who thought a Brontosaurus and an Apatosaurus
were two different species, discovered the two dinosaurs were
actually the same. So scientist applied the name first given
to this huge, 33-ton dinosaur: Apatosaurus. The big
animal had nostrils on top of its head, allowing it to breathe
while part of its head was under water.