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Dinosaurs

fossil

Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder:  Dinosauria

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Dinosaurs were animals that lived 100 million years ago. Some dinosaurs were more like reptiles while others were more bird-like. Although many creatures are sometimes called dinosaurs, dinosaurs did not fly or live in the ocean.

What did they eat?

Most dinosaurs lived off of plants, but some were carnivores and ate meat. The carnivores have become famous in the movies like Jurassic Park. The T-Rex and the Velociraptor are two of the scary carnivores.

How do we know about dinosaurs?

We know about dinosaurs from fossils that are found in the ground. From fossils, scientists are able to recreate whole skeletons of dinosaurs and determine what the dinosaurs were like. Some of these fossils and skeletons can be seen in museums. Fossils of dinosaurs have been discovered on every continent of the world. Fossils from the same type of dinosaur have been found on different continents as well.

Were they all big?

Dinosaurs, in general, were very large. Some dinosaurs are thought to have been 40 feet tall or more. This is twice as tall as the tallest giraffe ever. There were also some smaller dinosaurs that were just a foot or so tall. There were a wide variety of dinosaurs from giant lumbering plant eaters that walked on four legs to fast dangerous meat eaters that could run on two legs.

Why did they go extinct?

Well, scientists aren't 100 percent sure, but many think that the dinosaurs went extinct when a giant meteorite hit the Earth. When the meteorite hit, it sent up dust and dirt into the sky covering up the sun for a really long time. This caused all the plants to die, and soon the dinosaurs died too.

Two dinosaurs


Biggest, Fastest, Tallest

There is a lot of debate on which dinosaur is the biggest, smallest, smartest, etc. We don't know for sure, but we can take a good guess using the latest information from paleontologists.
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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