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More than a year after it first lost contact with its Mars rover Spirit, NASA has finally decided to throw in the towel. Yesterday, the agency confirmed that it will end all planned communications with the robot on May 25th, effectively ending the craft's seven-year mission. NASA was hoping that the approaching Martian spring would allow the Spirit to recharge its solar panels and re-establish radio contact, but it now appears that the craft sustained irreparable damage last winter, when it was forced to endure brutally cold temperatures. NASA executive David Lavery, however, says the rover team will remember the Spirit more for its achievements than its slow demise: "I think we'll all sit around and have a sip of Guinness and reminisce about when Spirit was a wee small little rover and look back at the accomplishments and successes rover had over its entire lifetime." So the Spirit's spirit will live on, but what about NASA's mission to Mars? Well, the Oppo...

Sending a rover to a distant planet is no small feat, so we might as well make the landing even more spectacular, right? That's exactly what NASA has in mind for its  Curiosity  Mars rover, albeit for more practical reasons. Launching in late 2011 and expected to land on Mars in August 2012, this mobile laboratory will see a unique descent after entering the Martian atmosphere: there'll be the usual separation from the heatshield and backshell, but at about 380 seconds into the entry, the rover will be gently lowered down by wire from a "sky crane," as opposed to taking a leap of faith. Once the landing is complete, the hovering sky crane will then detach from the rover and fly off for a dramatic disposal -- let's just hope it won't hit the now-dormant  Spirit . See for yourself in the video above. Space NASA