Alfred Wegener produced evidence in 1912 that the continents are in motion, but because he could not explain what forces could move them, geologists rejected his ideas. Almost 50 years later Harry Hess confirmed Wegener’s ideas by using the evidence of seafloor spreading to explain what moved continents.
Animals evolved separately on each continent. ... Animals swam across the ocean to new continents. Continents were once one landmass and have drifted apart.