The Curiosity rover landed in Gale Crater back in 2012 and since then has been busy studying the surface of Mars.
But what about the air? Well, Curiosity has been curious about that as well and seems to have discovered that the oxygen on the Red Planet behaves strangely.
It has detected the largest amount of methane ever measured and discovered oxygen behaves in a way that can’t be explained by any chemical process scientists understand at this time.
Source: https://www.independent.co.uk/life-style/gadgets-and-tech/news/nasa-mars-oxygen-gas-alien-life-curiosity-rover-methane-a9200701.html
