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The giant CERN experiment, built in a tunnel complex under a Swiss mountain, took nearly 20 years to complete and cost more than 3.75 billion euros. Scientists said a faulty electrical connection between magnets was likely to blame for a helium leak which caused the Large Hadron Collider (LHC) to be shut down last Thursday. The LHC is a 27-kilometre circular tunnel in which parallel beams of protons accelerate close to the speed of light. It aims to resolve some of the greatest questions surrounding fundamental matter, such as how particles acquire mass and how they were forged some 13.7 billion years ago.
(Deutsche Welle)
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