How Did Alfred Wegener Say That The Continental Plates Are Constantly Moving

Alfred Wegener claimed that the continental plates are moving constantly which is known today as continental drift. The continents seemed like they fit together like a puzzle. For example, Africa and South America seemed like they were once connected to each other because of their shape. There were also many fossils that were found in one country and in another that was across the planet. An example of this was when fossils of the Mesosaurus were found in Africa and in South America. Also, rocks that were found in the northeastern U.S were also found in Greenland. All of the evidence suggests that the plates are constantly moving.