What happened to the dinosaurs ?

What happened to the dinosaurs ?

- Milion of years ago there were a lot of dinosaurs in the world. Some lived on land. Some lived in the sea. Some could fly. A lot lot of of them were very big,
and some had horns and long teeth like the monsters in films. Most of the dinosaurs were plant eaters, but some of them could kill and eat very big animals.

The world was full of dinosaurs for about 135 milion years. 60 milion years ago, however, they were all dead. What happened to them ? The dinosaurs could not live in a cold climate. 100 milion years ago the world was not a very cold place, but some scientists say that about 65 milion years ago the world's climate changed. The new climate was cold and this climate killed the dinosaurs . Now we can see dinosaurs bones in museums, but we can not see a real dinosaur.