Evolution of the Dinosaurs

Dinosaurs First Appear

How long were dinosaurs dominant on Earth?

The dinosaurs were the dominate species on Earth for approximately 160 million years. The Mesozoic era, often referred to as the “age of the reptiles,” lasted from approximately 250 to 65 million years ago. It includes the Triassic, Jurassic, and Cretaceous periods.


This is a web preview of the "The Handy Dinosaur Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App