Science and technology

Associated Press
FILE- In this Friday, Jan 11, 2013, file photo, Justin Bredeau, of Las Vegas, tries out a Sony 3-D personal viewer at the Consumer Electronics Show, in Las Vegas. An Associated Press investigation released in January 2013 found that millions of mid-skill, mid-pay jobs have disappeared over the past five years and have been replaced with technology. That experience has left a growing number of technologists and economists wondering if middle-class jobs will return when the global economy recovers, or are they lost forever because of the advance of technology. (AP Photo/Julie Jacobson, File)

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