Farewell, Opportunity: Rover dies, but its hugely successful Mars mission is helping us design the next one
(PHYSorg.com Space & Earth)

NASA`s Opportunity rover on Mars has been officially pronounced dead. Its amazingly successful mission lasted nearly 15 years, well beyond its initial three-month goal. Opportunity provided the first proof that water once existed on Mars and shaped its surface, a crucial piece of knowledge informing both current and future missions.