Published January 24, 2014Associated Press This artist rendering released by NASA shows the NASA rover Opportunity on the surface of Mars. Opportunity landed on the red planet on Jan. 24, 2004 and is still exploring. Its twin Spirit stopped communicating in 2010.AP Photo / NASA LOS ANGELES – A decade after landing on Mars, the rover Opportunity is still chugging along. Sure, it has some wear and tear. One of its six wheels and two instruments stopped working long ago. It has an arthritic joint. Its flash memory occasionally suffers a senior moment. But these problems are considered minor for a journey that was supposed to be just a...
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