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"Washington, Feb 28: After an exhaustive analysis of data obtained during 605 Martian days, NASA's Curiosity rover has confirmed the presence of methane on Mars environment which may hint that life once existed on the Red Planet. The tunable laser spectrometer in the SAM (Sample Analysis at Mars) .."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.ap7am.com/english-news-8776-methane-on-mars-hints-life-existed-there-nasa.html>