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Scientists at Europe's CERN lab plan to use the Large Hadron Collider to smash highly-energised protons together at super-fast speeds to produce miniature versions of the Big Bang. The collisions will create temperatures more than 100,000 times hotter than the heart of the sun. The LHC straddles the French and Swiss borders. Scientists hope it will reveal what happened to particles moments after the big bang The machine will be operated undergound in a 27km long tunnel near Geneva and detectors will trace and analyse the particles that emerge from the collisions. Physicists hope it will help answer profound questions such as 'What is the origin of mass?' and 'What is 96% of the universe made up of?' But some critics fear the collider could create microscopic black holes that could swell and end up eating the whole world...

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