Word: callisto
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...once as wet as Earth and still harbors ice and perhaps liquid water. The moon is thought to have water locked in permafrost at its poles. Jupiter's moon Europa is probably home to a globe-girdling ocean beneath a thin rind of ice, and its Jovian sisters Callisto and Ganymede appear to be icy and wet too. Now, according to new findings by the Cassini spacecraft, one more name can be added to the list of water worlds: Enceladus, a small moon orbiting Saturn. What's more, Enceladus' water might be unusually hospitable to the emergence of life...
...Mars too could be home to similarly hearty subsurface life forms, as could two of Jupiter's other moons, Ganymede and Callisto. If the discovery here on Earth of tough little organisms living miles below ground, frozen in polar ice and hanging on in the broiling waters of deep-sea vents indicates anything, it's that biology emerges in very improbable places. The most remarkable thing we may come to conclude about 581c is that whatever secrets it holds may not be that remarkable...
...that old moon river again. Not content with finding ice on our very own Luna, scientists unveiled evidence in the journal Nature Thursday of entire underground oceans on no less than two of Jupiter's moons. Europa and Callisto were long suspected to bear icy crusts, but at a decidely chilly 483 million miles from the Sun, nobody expected these rocks to be anywhere near tropical enough for the liquid stuff. "If we find out four and a half billion years after the formation of the solar system that there's still enough heat that ice will melt...
Although scientists do not see Callisto as a possible source of life, the Galileo Project focuses on further study of the moon...
Specifically, Hibbittz's research coordinates data from NIMS with geological information to provide scientists with a more accurate perspective of the physical and chemical processes taking place on Callisto...