The large-scale drift of the mainland has long been a problem faced by people who have the ability to manage. 1620, bacon of France marked similar parts on both sides of the Atlantic on the map. Austrian geologist theseus (1909) pieced together the continents in the southern hemisphere and speculated that Gondwana existed. German young meteorologist Wei Gena (19 12, 19 15) put forward the viewpoint of continental drift most systematically. According to the similarity of paleontological fossils, rock characteristics and geological structures, he proposed that both sides of the Atlantic Ocean were once a continent, and then collected a lot of evidence, speculating that there was a United ancient continent with global unity 300 million years ago and 200 million years ago. This theory was a sensation in the 1920s, but because Wei Gena thought that "the continental drift of silicon and aluminum was on the oceanic crust of silicon and magnesium" at that time, this continental drift mechanism was inconsistent with geophysical data (the viscosity between them was too large, far exceeding the driving force of drift), and because of the lack of paleontological evidence, it was strongly opposed and attacked by the famous British geophysicist jeffries and others, and almost disappeared in the 1930s. It was not until 1950s that the large-scale deep-sea survey and the development of paleomagnetism made the theory of "continental drift" rise again on the basis of new facts, and in 1960s, the theory of global plate tectonics was formed. = = = = = = = The above is quoted from Introduction to Earth Science, Higher Education, 2000 109. It was a sensation to delete and modify continental drift, but it soon disappeared in ridicule. Although Wei Gena has found a lot of evidence, if others find evidence against this scientific theory, such as the lack of motivation for continental drift, this theory can only be called a hypothesis, not a real theory. When people explain the distribution of ancient creatures such as dragons, tongues and ferns, they still use continental bridges to prevaricate. Although the land bridge theory seems absurd, at that time, people thought that there was another theory that was even more absurd, and that was Wei Gena's continental drift theory. Some people joke that the theory of continental drift is just "the dream of great poets". Only Wei Gena sings his own poems alone. 1930, when Wei Gena visited Greenland for the third time, he was unfortunately buried in the ice and snow. He was only 50 years old, and his body was found the next summer. He left a little early, because a German scientific research ship just returned from the Atlantic Ocean, bringing a message that there is a long mid-ocean ridge in the middle of the Atlantic Ocean, where there is a huge rift valley. With Wei Gena's extensive knowledge, it will be possible for him to find a solution to the dynamic problem of continental drift, and the movement of the seabed will provide clues for continental drift. It's a pity that he is cut off from the news forever. Like many scientists who were ahead of the times, he was born a little earlier and could not wait until his theory was accepted by the world. Perhaps, only the lonely land of ice and snow can understand Wei Gena's loneliness before his death. Wei Gena's soul was frozen in the snow in Greenland, and the theory of continental drift was dusty on the library shelves. = = = = = = = = = The above is quoted from Wei Gena's entry "Deep Sigh" in Baidu Encyclopedia. . .