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Published online 26 July 2001 | Nature | doi:10.1038/news010726-12
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Callisto's watery secret
One of Jupiter's moons may hold an underground ocean.
One of Jupiter's largest moons, Callisto, may hold watery secrets beneath its surface, suggests a new analysis. The satellite's icy crust may be the planetary equivalent of a blanket, insulating an underground ocean.
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