Dinosaurs Are Not ExtinctAs time goes by, more and more dinosaur fossils are richly known; more and more related research projects are working on. An encouraging idea that dinosaur species are not extinct and are evolving into birds has emerged. The dinosaurs are still there. They are still everywhere in the human era. This seems crazy. Nonetheless, it seems the clues are everywhere. There is a species of dinosaur, called Sauroposeidon, that could lift its massive head more than eighteen meters into the air, but this was only possible because its neck bones were so light, hollow at almost 85 % (name). Like Sauroposeidon, other types of dinosaur bones were dimpled with empty spaces. In fact, everyone already knows that birds also have hollow bones, and many people think this is an adaptation for flight. Scientists have learned that birds inherited their lightweight, hollow bones from their extinct ancestors, gigantic dinosaurs. And there is another clue. (noun)Dinosaur lungs are designed like normal birds, which can be seen every day all over the world. Focus on the respiratory system...