In fact, human beings have a long history of discovering dinosaur fossils. Long before the discovery of Iguanodon, Europeans knew that there were many grotesque huge bone fossils buried underground. It was not until paleontologist Mantel discovered Iguanodon and compared it with iguana that the scientific community initially determined that it was a group of extinct lizard-like reptiles. 1842, British paleontologist Charles Owen coined the word "dinosaur". English dinosaurs came from the Greek deinos (scary) Saurosc (lizard or reptile). For Owen at that time, this "scary lizard" or "scary reptile" refers to an extinct large reptile (actually it is not). In fact, not many dinosaurs were found at that time. Since the discovery of dinosaur fossils in Antarctica in 1989, dinosaur remains have been found in seven continents all over the world. At present, there are at least 650 to 800 genera of dinosaurs described in the world (species and genera in paleontology are not completely different from the classification of modern animals). Later, scholars in China, Japan and other countries translated it into a dinosaur, because there have been legends about dragons in these countries, which think that dragons are the length of scale worms and snakes are another name for dragons.