Dinosaurs were lived about 235 million years to 65.95 million years ago, to support the body upright hind legs of terrestrial animals, most belong to terrestrial (perched on land) reptiles, but can walk upright, dominate the global terrestrial ecosystem more than one hundred and sixty million years. Most dinosaurs extinct, but the generations of dinosaurs, birds survive and reproduce so far.
The early detection of although dinosaur fossil has been present upon earth for tens of millions of years, but until the 19th century, people didn't know the earth once had such a strange animal existed. The first dinosaur fossils found is called JiDiAng · mante's British physician. Mante er doctors usually have collecting rocks and fossil hobby. In 1820, he and his wife Mary Ann found some embedded in the rock the great teeth. Mante er physicians have never seen such a big teeth. When he was in a nearby and found many bones, he began to these unusual finding on serious research. After some time, the mantle's doctors get a conclusion: these teeth and bones should belong to a huge reptile all, he will be the unknown animal named iguanodon, the original meaning of scientific means iguana teeth. Soon, Britain and found two huge reptile bones, they were named megalosaurus and forest dragon. Until in 1841, these giant reptiles have formal name. Was an outstanding scientist Richard Owen jazz, will they named a dinosaur, scientific name mean terrorist lizard. From now on the study of dinosaur upsurge, scientists all over the world cheerfully in the ranks of the dinosaur dig.
from:http://www.squidoo.com/the-world-of-dinosaurs
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