1. THE TRUE STORY!!! Tyrannosaurus Rex Ceratosaurus

2. For about 160 million years, dinosaurs were the largest and most successful animals on land. Then about 65 million years ago,these huge Dinosaurs died out and mammals became the most dominant animals on earth. Scientists have thought of many theories to explain the Dinosaur extinction. For about 160 million years, dinosaurs were the largest and most successful animals on land. Then about 65 million years ago,these huge Dinosaurs died out and mammals became the most dominant animals on earth. Scientists have thought of many theories to explain the Dinosaur extinction.

3. The Asteroid theory claims that a large asteroid hit earth at the end of the Cretaceous period. The Asteroid theory claims that a large asteroid hit earth at the end of the Cretaceous period. This asteroid impact would have thrown billions of tonnes of dust and rubbish into the atmosphere. Heat from the impact may have caused huge fires world wide. This asteroid impact would have thrown billions of tonnes of dust and rubbish into the atmosphere. Heat from the impact may have caused huge fires world wide. Together the clouds of smoke and rubbish would have blocked the sunlight from reaching the surface of earth for many months. Together the clouds of smoke and rubbish would have blocked the sunlight from reaching the surface of earth for many months. Although the seeds and roots of plants had a good chance of surviving this lightless period, the plants themselves stopped growing, and died. Although the seeds and roots of plants had a good chance of surviving this lightless period, the plants themselves stopped growing, and died. If the catastrophe was world spread enough, plant eating dinosaurs would have starved to death. As the plant eating dinosaurs died, so did the meat-eating dinosaurs that fed on them. If the catastrophe was world spread enough, plant eating dinosaurs would have starved to death. As the plant eating dinosaurs died, so did the meat-eating dinosaurs that fed on them.

4. Toward the end of the Cretaceous period, the shallow seas dried up and the climate became more varied around the globe. Toward the end of the Cretaceous period, the shallow seas dried up and the climate became more varied around the globe. Winters became too cold and summers too hot for dinosaurs to survive. Winters became too cold and summers too hot for dinosaurs to survive. Dinosaurs were to big too hibernate in dens, and had no fur or feathers for protection against the cold. They probably also had difficulty cooling off in hot weather. Dinosaurs were to big too hibernate in dens, and had no fur or feathers for protection against the cold. They probably also had difficulty cooling off in hot weather. Death and extinction came as a result of gradually much colder winters and much hotter summers. Death and extinction came as a result of gradually much colder winters and much hotter summers.

5. Most scientists,however feel that no single theory fully explains why dinosaurs suffered extinction. Most scientists,however feel that no single theory fully explains why dinosaurs suffered extinction. They argue that a combination of causes contributed to the dinosaurs disappearance. They argue that a combination of causes contributed to the dinosaurs disappearance. In fact, experts now believe that not all dinosaurs became extinct at the end of the cretaceous. In fact, experts now believe that not all dinosaurs became extinct at the end of the cretaceous. Many scientist regard birds as living dinosaurs that survived the great extinction. Many scientist regard birds as living dinosaurs that survived the great extinction.