Titan and Europa are considered one of the most biologically interesting worlds in the solar system. There is the likely presence of a sub-surface ocean of liquid water which could be as much as 150 km deep. This could provide a medium and solvent for life. Europa has intense radiation from Jupiter's magnetosphere and the moon Titan; is the same for Saturn. The radiation might be striking ice on each moon's surface and releasing oxygen, which if it finds its way into oceans could provide a fuel for life. Also, there is the possible presence of undersea volcanic vents, on Europa, which could furnish energy and nutrients for organisms.
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| Exporation probe on Europa |
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