How long were dinosaurs on earth? On this page we’ll find out how long the 'age of the dinosaurs' lasted. We’ll find out when the first dinosaurs appeared, and when dinosaurs went extinct.
We’ll also take a look at the geological time periods in which dinosaurs inhabited Earth. These are periods of time based on layers of rock. They include the Triassic, Jurassic and Cretaceous periods.
At the end of the page, you’ll find a list of amazing facts about how long dinosaurs were on Earth and the immense timespans involved.