Martian Methane Reveals the Red Planet is not a Dead Planet
NASA has detected plumes of methane being emitted during the spring and summer, indicating that microoganisms may exist on Mars. The true test, other than finding the organisms, is to test for the level or deuterium in the methane. Living organisms prefer lighter isotopes so methane with less deuterium than the water released with it indicates it was formed through a biological process.