Answer
Wegener's continental drift hypothesis was strongly supported by numerous discoveries in the 1950s. These included the discovery of seafloor spreading, Theory that new ocean floor is created at mid-ocean ridges and moves away from the ridges, and the discovery of paleomagnetism, the study of the Earth's magnetic field through time. Paleomagnetism showed that the continents had once been joined together in a supercontinent called Pangaea.