Wegener's hypothesis was that all the continents were once joined together in a single landmass and have since drifted apart. Wegener's idea that the continents slowly moved over Earth's surface became known as continental drift. His evidence included the fit of the continents (like puzzle pieces), glacial till deposits, and the apparent shifting of climatic belts during the passage of time. Glacial deposits and grooved bedrock in the southern part of South America, Africa, India and Australia suggested that these areas were once connected and and covered by glaciers.
