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A supercontinent is an enormous landmass formed when most or all of Earth's continents collide and merge together, with Pangaea being the most famous example from about 250 million years ago. Supercontinents matter because they significantly affect global climate, ocean circulation, and the distribution of life on Earth, and understanding them helps scientists reconstruct Earth's geological history and predict how continents may reconfigure in the future.

AI-generated from the Wikipedia summary — may contain errors.