Around 1910, Wegner began looking into the proposal that in the Late Paleozoic era, all present-day continents had been one big supercontinent, which had broken apart. Wegner called this ancient world, Pangaea. The scientist then began stating that Pangaea’s continental parts had slowly moved thousands of miles apart over long periods of time. He called this movement die Verschiebung der Kontinente, or continental displacement which soon became known as continental drift. To prove his proposal, Wegner needed evidence. Wegner found closely related fossil organisms and similar rock strata in both the Americas and in Africa. Wegner’s theory of continental drift was practically forgotten until the 1960’s , where it was soon a part of the theory of plate tectonics.