Silence to fall for Spirit on Mars

It's been a year since the rover sent a signal. After Tuesday, NASA scientists at the Jet Propulsion Lab will stop trying to send it commands. Its twin, Opportunity, continues to work 7 years into what was to be a 3-month mission.After a year of fruitlessly trying to communicate with Spirit, one of two rovers on the surface of Mars, NASA scientists have finally decided to let it rest in peace. They plan to send their last commands to the rover a little after midnight Wednesday morning.

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