Traces of methane gas on Mars detected by planetary scientists present the tantalizing possibility that elementary life may exist below the surface of that most intriguing planet.
According to a recent report, the origins of the methane are unknown and the results of analyses are inconclusive. The methane may result from biological production, or from chemical processes. The report says that it is unlikely that the methane is of ancient origin, since exposure to sunlight would have long since destroyed any such remnants.
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If such life exists, it may be years since it can be accessed using current technology. Since such life would be buried beneath the surface, it would seem that devices would be required to drill deeply into the Martian surface, and space probes available to us today simply do not have this capability.
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