Dinosaur, Definition, Types, Pictures, Videos, & Facts

Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years. Most died out by the end of the Cretaceous Period. Many lines of evidence show that one lineage evolved into birds about 155 million years ago.

Tyrannosaurus rex, facts and photos

What Is a Dinosaur, Dinosaurs for Kids

Two new dinosaur species, as big as a blue whale, discovered in

Dinosaur sported impressive mane and had ribbons protruding from

Ultimate Dinopedia: Complete Dinosaur Reference (for iPad) Review

Dinosaur, Definition, Types, Pictures, Videos, & Facts

100 Fun Facts About Dinosaurs That'll Blow Your Mind - The Fact Site

10 Facts About Tyrannosaurus Rex (T. Rex) - Dinosaurs for Kids

Carnivorous Dinosaurs List, Species Names & Types - Video

97 Mind-Blowing Dinosaur Facts

Dinosaur Definition, Types, Pictures, Videos, & Facts

Different Kinds of Dinosaurs

6 Awesome Dinosaur Species You Should Know

Dinosaur Facts. - ppt video online download