We take a look at the answer to this intriguing question
Methane on Mars isn’t being released by wind erosion
But the origins of the gas remain unclear
Another clue has been found about Mars’ methane mystery
Methane on Mars could be the calling card for microbial life on the Red Planet
Get the latest as NASA goes for gold on Mars
Find out how to stay up to date with the upcoming landing of NASA’s Curiosity rover on Mars right here.