介绍： ANIMAL EXTINCTION

Many animals have disappeared during the long history of the earth.The most famous of these animals are dinosaurs.They lived on the earth tens of millions of years ago, long before humans came into being and their future seemed secure at that time.

There were many different kinds of dinosa...

介绍： ANIMAL EXTINCTION

Many animals have disappeared during the long history of the earth.The most famous of these animals are dinosaurs.They lived on the earth tens of millions of years ago, long before humans came into being and their future seemed secure at that time.

There were many different kinds of dinosaur and a number of them used to live in China.The eggs of twenty-five species have been found in Xixia,County,Nanyang, Henan Province.Not long ago a rare new species of bird-like dinosaur was discovered in Chaoyang County,Liaoning Province.When scientists inspeacted the bones,they were surprised to find that these dinosaurs could not only run like the others but also climb trees.They learned this from the way the bones were joined together.

Dinosaurs died out suddenly about 65 million years ago. Some scientists think it came after an unexpected incident when a huge rock from space hit the earth and put too much dust into the air.Others think the earth got too hot for the dinosaurs