Science and technology

Associated Press
In this  April 25, 2012 photo, a drive train assembly is mated to a Buick Verano at the Orion Assembly plant in Orion Township, Mich. Nearly four years after GM filed for bankruptcy protection, the automaker is building the Verano and the Sonic, the best-selling subcompact car in the nation. (AP Photo/Duane Burleson)

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