BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY BERNHARD EDMAIER / SCIENCE PHOTO LIBRARY
Mount Etna erupting. View of a night eruption of the volcano Mount Etna in Sicily with the full Moon in the sky (upper left). The glowing hot ejected matter leaves orange trails as it is thrown from the crater. Etna is a very active volcano which has erupted and released lava several times in recent history. Eruptions are caused by magma (molten rock) being forced up a vent by pressure from deep within the Earth.
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