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Life on Earth occupies some bizarre places – pools of pitch, deep-sea hydrothermal vents, and lightless lakes buried under glaciers. While scientists hunt for hospitable planets circling other stars, the solar system has a few candidates. Here are five.
Geyser-like eruptions of ice particles and water vapor shoot out from the south pole of Saturn's moon Enceladus. (NASA/AP/File)
3. Enceladus
This icy moon of Saturn also has subsurface deposits of liquid water or slush, a rocky core, and Saturn's gravity for heat. Active ice volcanoes could be circulating nutrients that life forms could use.
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