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[[File:Sagan large.jpg|thumb|400 px|Carl Sagan with a model of the Viking Lander in Death Valley California. Viking 1 and II were the first spacecraft to search for present day life on Mars - and so far the only ones to search directly for life anywhere ouside of Earth.<br><br>Our other spacecraft on Mars such as Curiosity isare searching for habitability as its main priority, not life itself. Trace Gas Orbiter is searching for more information about the methane plumes and other biologicaly relevant molecules<br><br>Hopefully that will change soon - there are many proposed astrobiological instruments and missions and renewed interest in the topic since the surprising discovery by Phoenix of liquid water on its legs. Then there are the Enceladus geysers, the Europa geysers now, the ice on Ceres, and discoveries about the methane / ethane lakes and atmosphere of Titan, and intriguing signals in the Venus atmosphere that some think may be signs of some form of aereal lifeforms. Exciting times for astrobiology.]]
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Astrobiology:
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