It is believed that they were on Earth for a whole 165 million years. 

They became extinct around 66 million years ago.

They were called the triassic, jurassic and creaceous periods.

In these periods, different dinosaurs existed. 

Did you know that the Stegosaurus was already extinct by the time the Tyrannosaurus existed? 

In fact, it was extinct around 80 million years before!

In fact, there were more than 700 different ones. 

Some were big, some were small.. 

They roamed the land and flew in the skies. 

Some were carnivores and others were herbivores!

We know that dinosaurs lived on all continents because of this. 

The people who look for dinosaur fossils are called palaeontologists

‘Dino’ comes from the Greek word ‘deinos’ which means terrible.

‘Saurus’ comes from the Greek word ‘sauros’ which means lizard.

Richard Owen came up with this name in 1842 after he had seen lots of dinosaur fossils being uncovered. 

He realised that they all linked in some way and came up with the name

There were very tall ones, very small ones and very heavy ones!

It is believed that the Argentinosaurus weighed up to 100 tonnes which is the same as around 15 elephants!

The Argentinosaurus’ poo was the equivalent of 26 pints. Yuck! 

It was also around 8 metres tall and 37 metres long.