The U.S. space agency, for the fifth time, is extending the program for its Mars Exploration Rovers.
The National Aeronautics and Space Administration said its decision to keep the robots Spirit and Opportunity in operation, possibly through 2009, is dependent upon the rovers' continued productivity and operability.
http://www.sciencedaily.com/upi/index.php?feed=Science&article=UPI-1-20071016-10284300-bc-us-rovers.xml
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