Waspie_Dwarf Posted November 25, 2013 #1 Share Posted November 25, 2013 How Habitable Is Mars? A New View of the Viking Experiments Almost 40 years ago, two NASA probes on the surface of Mars scooped the soil in search of signs of microbes. The results that came back from the twin Viking missions were, to say the least, ambiguous. The scientific literature contains decades of debate over what they found. Read more... Link to comment Share on other sites More sharing options...
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