According to the speed of movement of the dinosaur research, scientists believe that dinosaurs even at 5-8 km / hour low-speed walking, walking for 12 hours a day, dinosaurs can also marched 3,000 kilometers in two months. Therefore, the dinosaur groups can only be achieved within a year back and forth between north and south migration. There is evidence that some dinosaurs are still among the various continental blocks migration. The part-time in the Cretaceous, the Arctic, North America and Asia, between the connection point, such a bridge to make dinosaurs migration between the two continents possible. Dinosaur fossil evidence strongly supports the existence of the proliferation of bi-directional movement because it is now known Cretaceous dinosaurs in North America in almost every section has its own representatives in Asia. For example, the duck-billed dinosaur, and dinosaurs on ceratopsians are mainly distributed in North America and East Asia, to illustrate these two regions, the Late Cretaceous dinosaur group has a very close relationship. The Australian continent and the Antarctic continent found several dinosaur fossils, showing in Europe, North America, some species are closely related. Description The land mass was once linked, the occurrence of dinosaur migration and proliferation, in slowly until after separation. Dinosaur migration theories about, and we look forward to more and more systematic evidence to explain it.