NASA makes intriguing discovery on Mars The Curiosity rover has detected "startlingly high" levels of methane - the gas typically produced by life as we know it - on Mars, the New York Times reported. The challenge ahead »

NASA makes intriguing discovery on Mars The Curiosity rover has detected "startlingly high" levels of methane - the gas typically produced by life as we know it - on Mars, the New York Times reported. The challenge ahead »