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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 [[Viking II|II]] were the first spacecraft to [[Viking_lander_biological_experiments | search for present day life on Mars]] - and so far the only ones to search directly for life anywhere ouside of Earth.<br><br>{{cot}}Our other spacecraft on Mars such as [[Curiosity_(rover)|Curiosity]] are searching for habitability as its main priority, not life itself. [[ExoMars 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 (spacecraft)|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 (moon)|Titan]], and intriguing signals in the [[Venus]] atmosphere that some think may be signs of some form of aereal lifeforms. Exciting times for astrobiology.{{cob}}]]