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Apatosaurus (Brontosaurus)

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The Apatosaurus, also called the Brontosaurus, was a truly giant dinosaur that lived around 150 million years ago. It was first described by O. C. Marsh, a paleontologist from Yale University, in 1877.

Source: The dinosaurs of North America
How big was the Apatosaurus?

The Apatosaurus is one of the largest animals to ever live on earth. It was 75 feet long and 50,000 pounds! It had a really long neck and tail as well as a small head. It may have used its long neck to reach out of the way food as well as to keep its head away from shorter predators.

The Apatosaurus walked on four legs. It was very slow moving due to its large weight. It also probably wasn't very intelligent due to its small head and brains in comparison to its overall size. It is unlikely that the Apatosaurus held its head high in the air like shown in many pictures. This is because it would have been hard for the heart to pump blood that high. Also, the way its neck was structured would have made lifting its head high difficult.

Where did it live?

Fossils have been found in North America in Colorado, Utah, Wyoming, and Oklahoma. At one time scientists thought that the Apatosaurus lived in water and swampy areas. This was because its nostrils are on the top of its head. They thought this was because it used them to breath while in deep water. However, due to where fossils have been found, it is likely that they lived on dry land.

What did the Apatosaurus eat?

The Apatosaurus was an herbivore, meaning it only ate plants. It had to eat a LOT of plants every day to maintain its large size. It probably ate all sorts of plants including tree leaves and ferns. It didn't chew its food, but rather had stones called gastroliths in its stomach that helped to digest its food.

Where can I go to see an Apatosaurus?

Fossils of the Apatosaurus can be seen at the American Museum of Natural History, the Carnegie Museum of Natural History, and the Yale Peabody Museum.

Illustration of Apatosaurus louisae
Source: Wikimedia Commons
Fun facts about the Apatosaurus

For more about Dinosaurs:

Apatosaurus (Brontosaurus) - Giant plant eater.
Stegosaurus - Dinosaur with cool plates on its back.
Tyrannosaurus Rex - All sorts of info on the Tyrannosaurus Rex.
Triceratops - Learn about the giant skulled three horned dinosaur.
Velociraptor - Birdlike dinosaur that hunted in packs.

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