Even though it may seem like the theory of plate tectonics is simply a new and improved version of Wegener's continental drift hypothesis, the two ideas are really quite different. While both theories feature moving landmasses, to say the two are equal would be like comparing the Wright brothers' first airplane with a modern military jet. Unlike the original idea of continental drift, modern plate tectonic theory not only states that the continents were once one single landmass, it also explains in great detail how this landmass broke up and why the continents keep moving today. Most importantly, plate tectonics has answered a number of other questions that had been troubling geologists and has brought together different areas of science under one umbrella. Even though it is a relatively new theory, plate tectonics has stood the "test of time."
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