Mars Express Saw the Same Methane Spike that Curiosity Detected from the Surface of Mars

If you’re not a chemist, an astrobiologist, or a scientist of any sort, and that includes most of us, then a tiny, almost imperceptible whiff of methane in the Martian atmosphere might seem like no big deal. But it is, gentle humans. It is. Why? Because it could be a signal that some living process …