Dinosaurs

http://www.dailymotion.com/video/xenxye

These scientists are digging for fossils. Fosilized bones tell the story of dinosaurs, animals that were once living creatures and appeared on Earth some 225 million years ago. Dinosaurs dominated planet for 150 million years, much longer than people have existed. If you took all the time from the moment the dinosaurs appeared until now and shrunk it into a single day then at midnight dinosaurs first walked the Earth. They are flourishing at noon and don’t go extinct until 5 in the afternoon. In contrast, the first modern humans don’t appear until a minute and a half before midnight. Dinosaurs came in many shapes and sizes. The smallest dinosaur was less than 3 feet long. The largest were plant eating giants called Sauropodas longer than a city bus. This Sauropod called … Gibaria weight close to 50000pounds. To sustain its enormous body it would endlessly grap branches and leaves and swallow them down a 20 foot throat. That’s a neck as high as a two-storey house. With each step a weight greater than an eight ton wrecking ball would hit the earth. Despite their gigantic size dinosaurs share some treats with modern animals. Like today’s reptiles most, if not all dinosaurs, laid eggs. This Oviraptor died while sitting on her nest. Its mate probably brought food to the nest like birds do. The mother tended her eggs and like a bird she proded them into a circle. Many plant eating dinosaurs lived in herds probably to defend themselves against the meat eating or carnovares dinosaurs who hunted them. But 65 million years ago something happened that brought an abrupt end to the dinosaur age. No one knows exactly why but in a mass extinction dinosaurs suddenly vanished. Most scientists think the killer came from outer space. A giant comet or asteroid smashed into the Earth throwing massive clouds of dust into the atmosphere. As the planet were called and dark, the dinosaurs died off. Though the last prehistoric dinosaurs have long gone, scientists believe their descendents may live on. The skeletons of certain dinosaurs like these are strinkingly similar to modern birds. The common ancestor of these birds was probably a small two legged meat eating dinosaur. As the digging and research continues, each new find may help prove the dinosuars did not really go extinct after all. The birds are in fact living breathing and flying dinosaurs