Science and technology

Associated Press
Apple CEO Tim Cook speaks at the Apple Developers Conference in San Francisco, Monday, June 11, 2012. Apple says it's introducing a laptop with a super-high resolution "Retina" display, setting a new standard for screen sharpness. The new MacBook Pro will have a 15-inch screen and four times the resolution of previous models, Cook told developers at a conference in San Francisco. (AP Photo/Paul Sakuma)

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