The stuck in the sand Mars rover reached a point where there was inadequate energy to run its survival heaters. That being the case, the rover likely experienced colder internal temperatures last year than in any of its prior six years on Mars. Many critical components and connections would have been susceptible to damage from the cold. Today, a transmission from Earth will be the last in a series of attempts to reawaken the robot.
Not too bad for a little robot that had a life expectancy in months, not years.
via Boing Boing