Saturn's moon Enceladus, which was already considered one of the few potentially habitable worlds in the solar system, just got even more interesting. NASA's Cassini spacecraft has detected molecular hydrogen in the plumes of water vapor that erupt from fissures in the ice at the moon's south pole. Scientists say that could be a sign that the moon's underlying ocean could host hydrothermal activity, a process that fuels life in Earth's oceans. The new result is exciting, but it's just one of several recent developments that have made Enceladus an even more intriguing target for future life-seeking missions.
Article:http://physicstoday.scitation.org/do/10.1063/PT.5.9092/full/
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