NASA robots continuously catch 'unexpected life signals'
Methane, one of the signs that suggests alien life, was found in an absurd way by the Curiosity robot.NASA robot enters the alien 'river of life'
NASA's Curiosity rover will enter an area that has never been explored and may hide alien creatures - ancient or alive.Mars panorama for the first time appears in extremely high resolution image
NASA's Curiosity self-driving vehicle has captured unprecedented sharp images of the Red Planet.Mars weather is extremely harsh
'Mars is as cold as hell', singer Elton John lifted the forecast of such a Martian climate in the Rocket Man song released in 1972 - four years before the Viking 2 landing chamber.