The Mars Opportunity rover currently exploring the Red Planet has been suffering from bouts of amnesia over the last several weeks. Flash memory aboard the vehicle has suffered periods of inactivity for months, but the problems have grown more common over time.
Opportunity launched to Mars on July 7, 2003, landing on its target planet on January 25, 2004. Managers at Jet Propulsion Laboratory designed the craft to survive long enough to complete a three-month science mission. Remarkably, the automated explorer is still operating nearly 11 years later.