Nasa launches latest effort to try and save Opportunity rover from death on Mars

Nasa is trying to save its Opportunity rover, a robot that is feared dead on Mars. Engineers have been trying for months to revive the struggling rover, which hasn't been heard from since June. Nasa thinks it was knocked offline by a huge dust storm that engulfed the entire planet and covered Opportunity. Now the agency is sending it a host of new commands in an attempt to force the 15-year rover to get back in touch with Earth. "We have and will continue to use multiple techniques in our attempts to contact the rover," said John Callas, project manager for Opportunity at JPL. "These new command strategies are in addition to the'sweep and beep' commands we have been transmitting up to the rover since September."