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This is a mosaic of 102 Viking Orbiter images of the Valles Marineris hemisphere of Mars - does life thrive beneath the surface? | NASA
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Life Possible On 'Large Regions' of Mars

Is life possible on 'large regions' of Mars? Find out if life is actually possible on 'large regions' of Mars just beneath the surface.

December 12, 2011
3:00 AM EST