Wegener's Continental Drift theory was not readily accepted by the science community of his day. It was difficult to conceive of large continents plowing through the sea floor to move to new locations. (kids.earth.nasa.gov)

The fossil record supports and gives credence to the theories of continental drift and plate tectonics. (enchantedlearning.com)

According to the continental drift theory, the supercontinent Pangaea began to break up about 225-200 million years ago, eventually fragmenting into the continents as we know them today. (USGS)