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Signs of methane-based life found on Titan.

If methane-based life exists, scientists expect that it would consume hydrogen and acetylene, and that is what NASA is finding on Saturn's moon Titan.  Readings from NASA's Cassini probe show that hydrogen is being drawn from the atmosphere at the moon's surface, and acetylene is missing from the surface.  Acetylene would be used as food by organisms that use methane instead of water, scientists speculate.  "If these signs do turn out to be a sign of life, it would be doubly exciting because it would represent a second form of life independent from water-based life on Earth," says astrobiologist Chris McCay.  NASA is now trying to rule out nonliving explanations for the consumables.  If during the process of elimination, they find something using a process of elimination, that would be a good indication of life...  The origin of feces.

Space.com article.
Tags: alien, astronomy, biology, cassini, life, probe, saturn, science, space, titan
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