"New research reveals there is hope for Mars yet. The first definitive detection of methane in the atmosphere of Mars indicates the planet is still alive, in either a biologic or geologic sense, according to a team of NASA and university scientists."
More at:
http://www.nasa.gov/mission_pages/mars/news/marsmethane.htmlExcept, if there are microbes beneath the surface of Mars, it could end up like War of the Worlds in reverse!