Nasa's Mars Rover Curiosity has failed to find a key chemical on the Red Planet challenging the theory of life on Mars. <br /><br />According to data collected by the robot, the Martian environment lacks methane. This comes as a surprise to researchers as previous information had indicated positive detections. Crucially, this reduces the possibility that life ever survived there. <br /><br />...<br />http://www.euronews.net/
