Now the methane's gone: A martian mystery deepens

The European Space Agency’s ExoMars spacecraft failed to find any traces of methane on the Red Planet during its hunt from April to August of 2018. This goes directly against recent positive reports of methane by ESA’s own Mars Express spacecraft and NASA’s Curiosity rover, which both saw methane in 2013. ExoMars has a sensitive detector that can pick up just one-tenth the amount of methane that Mars Express witnessed.
Read more: http://www.astronomy.com/news/2019/04/now-the-methanes-gone-a-martian-mystery-deepens?source=Snapzu