Curiosity has reported that there’s no methane in the Martian atmosphere. New findings from Curiosity strongly suggest that previous observations from Earth, which indicated that there was actually quite a lot of methane on Mars, were false. With no methane, it is very unlikely that there’s life on Mars — or life as we know it, anyway.

From October 2012 to June 2013, Curiosity used its Tunable Laser Spectrometer (TLS) six times to search for traces of methane in the Martian atmosphere.