HENNING DALHOFF / SCIENCE PHOTO LIBRARY HENNING DALHOFF / SCIENCE PHOTO LIBRARY
Volcano (right) and cryovolcano (right), computer illustration. Cryovolcanoes are not found on Earth, but there is evidence that they may exist on several solar system moons and dwarf planets. Unlike conventional volcanoes, which spew lava and ash, cryovolcanoes emit super-chilled liquids such as methane and ammonia.
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