1. Dinosaurs were existed about 160 millions years ago during the Jurassic period. 2. Dinosaur could live about 50-150 years; it depended on the environmental conditions. 3. The causes of the dinosaur’s death are clearly unknown. There are a lot of suppositions: changeable climate, asteroids, volcanoes, etc. 4. The largest dinosaur (the largest meaning the tallest and the heaviest) was Brachiosaurus. It was 12 meters tall and weighed 70-80 tons. The smallest dinosaur was Compsognathus. It was not much larger than a chicken. 5. The most intelligent dinosaur was Troodontidae. 6. There were two kinds of dinosaurs: herbivorous, which ate plants and predators, which ate meat. 7. Dinosaur Stegosaurus weighed about 3 ton and had small brain which was the size of a walnut. 8. Dinosaurs which could fly were called Archaeopteryx and Pterosaurs. 9. The most dangerous predator of dinosaurs was Tyrannosaurus Rex, today it is called ‘King Rex’. 10. Some kinds of modern crocodiles are considered to be descendants of dinosaurs.