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The continental drift theory of Alfred Wegener, proposed in 1912, is one of the most significant contributions to the understanding of the origin of continents and oceans. According to Wegener, all the present-day continents were once joined together in a single supercontinent called Pangaea, which was surrounded by a vast ocean known as Panthalassa. Around 200 million years ago, Pangaea began to break apart and the continents drifted to their present positions. This theory attempted to explain not only the distribution of landmasses and oceans but also similarities in geological and biological features across different continents. Wegener’s theory was based on several pieces of evidence. The most striking was the jigsaw ____ __________ ________ ________ ___ _____ ________ ___ _________.
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