Mars rover Spirit has unexplained computer reboots

(AP) -- NASA's aging Mars rover Spirit has rebooted its computer at least twice for unknown reasons.

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<p><a href="http://www.physorg.com/news158907961.html">Mars rover Spirit has unexplained computer reboots</a></p> <p>(AP) -- NASA's aging Mars rover Spirit has rebooted its computer at least twice for unknown reasons.</p>