The Mystery of Martian Methane
A short video by NASA regarding the recent discovery of Methane on Mars. Date- 15th Jan 08 Source- http://www.nasa.gov/multimedia/podcasting/solar_system_index.html 'The surprising thing about methane on Mars is that--first, that we detect it meaning it's recently generated. But in addition, we find that it's being released from several discrete vents--or sites--on the planet's surface in either mid-summer in the northern hemisphere or early spring in the southern hemisphere on Mars, and yet at a later season, we see essentially no methane. The big question is, "What is the origin of this methane now being released?" The two principal areas are first, by analogy with the earth, it could be released and produced initially--primarily--by biology. This'd be microbial activity acting on certain chemicals below the surface and then producing methane as a byproduct.'