A: Alfred Wegener (1880 ~ 1930) put forward the continental drift hypothesis in an important academic paper of 19 12, and developed and perfected it in a monograph published a few years later (19 15). Almost immediately, people realized that this assumption was potentially revolutionary, because it needed to revise all the foundations of geography. In the 1920s and 1930s, geographers discussed the concept of continental movement extensively, and the result was almost unanimous. Therefore, Wei Gena's theory of earth drift was in the stage of theoretical revolution for a long time. Until the mid-1950s, the new evidence that was constantly discovered was more and more conducive to the hypothesis that the mainland might move. But it was not until the 1960s that there was a real revolution in earth science.