Here's some links: http://www.popsci.com/science/article/2010-09/mars-methane-changes-seasons-and-scientists-wonder-why http://www.popsci.com/science/article/20

Here's some links: http://www.popsci.com/science/article/2010-09/mars-methane-changes-seasons-and-scientists-wonder-why http://www.popsci.com/science/article/2010-09/mars-methane-c... http://www.popsci.com/military-aviation-amp-space/article/2009-01/methane-may-point-life-mars http://www.popsci.com/military-aviation-amp-space/article/20... I know I'm probably missing something here. UPDATE: Okay, here we go: Various campaigns in the last decade have claimed to detect martian methane at levels as intriguingly high as 30 parts per billion1 and 45 parts per billion2. But more perplexing was the way that the methane signals sometimes appeared as hotspots, or plumes, and then disappeared — implying both a sudden injecton, as well as an unknown process to destroy the methane quickly, which would otherwise mix in the atmosphere and persist. Skepticism for these claims has abounded (See “Curiosity set to weigh in on Mars methane puzzle” ).