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Guides: Dinosaurs

Last Updated: Thursday October 21 2004 10:58 GMT

What is a dinosaur?

Allosaurus

Dinosaurs were reptiles which lived millions of years ago.

They evolved around 230 million years ago and lived in the Mesozoic period - known as the "age of reptiles".

Special scientists called palaeontologists (like Ross from Friends) study fossils and old bones to find out more about dinosaurs and how they lived.

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