Millions of years ago, long before there were any people, there were dinosaurs. Dinosaurs lived on the earth for over 165 million years but then they mysteriously became extinct. There were lots of different kinds of dinosaurs that lived at different times. Some were HUGE and some were much smaller. Some dinosaurs could move along quite quickly on two legs. Others walked on four legs in a very slow and clumsy fashion. Different dinosaurs liked to eat different things. Dinosaurs like the diplodocus liked to eat leaves: these dinosaurs are called herbivores. Dinosaurs like the velociraptor, or the T-Rex, liked to eat meat: these dinosaurs are called carnivores. All of the dinosaurs looked quite different. They could have armour plating,horns, bumpy skin or wings. There were lots of other differences too! Nobody knows exactly what happened to the dinosaurs. Some people believe that an asteroid caused changes on the earth that the dinosaurs could not adapt to.All that is left of the dinosaurs are fossils. These are dinosaur bones that have been discovered in the earth and rock. Images available from www.graphicsfactory.com www.communication4all.co.uk