Science and technology

Associated Press
FILE- This March 8, 2012 file photo shows attendees walking past the Sony PlayStation PS Vita console on display in the Sony PlayStation booth at the Game Developers Conference in San Francisco. Sony says its PlayStation Network is back online after three days of disruptions that began on Christmas. But heavy traffic might continue to cause problems for customers seeking to play their favorite games, the company said Sunday, Dec. 28, 2014. (AP Photo/Paul Sakuma, File)

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