LOS LLANOS DE ARIDANE, Spain — A bright red river of lava from the volcano on Spain’s La Palma island finally tumbled over a cliff and into the Atlantic Ocean, setting off huge plumes of steam and ...

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This year, the Earth’s core put on a show unlike any other, with volcanic eruptions that dazzled observers from every continent. Some of these eruptions were so breathtaking they left viewers ...

In the midst of a volcanic eruption, lightning can streak across the ash and smoke above it, but what do we think causes ...