World's biggest particle accelerator to start up again after 2-year shutdown and upgrade

April 5, 2015 9:12 AM

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BERLIN – The world's biggest particle accelerator is about to start up again after a two-year shutdown and upgrade.

Scientists at the European Organization for Nuclear Research, or CERN, were preparing to shoot the first particle beams on Sunday through the Large Hadron Collider's 27-kilometer (16.8-mile) tunnel, beneath the Swiss-French border near Geneva.

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