Most volcanoes form at the boundaries of Earth's tectonic plates, which are huge slabs of crust and upper mantle that fit together like puzzle pieces. Think of these plates as massive rafts floating ...
Mount Etna is more than half a million years old, but this massive stratovolcano in Sicily still has plenty of gas left in the tank. The 3,400-meter behemoth is the most active volcano in Europe, ...
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