Groundbreaking research by Alfred Wegener reveals that all the continents were once connected as one single land mass he called Pangaea. Learn more about Wegener's continental drift theory on The...
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Groundbreaking research by Alfred Wegener reveals that all the continents were once connected as one single land mass he called Pangaea. Learn more about Wegener's continental drift theory on The Science's Channel's "100 Greatest Discoveries."
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