Find out why the Large Hadron Collider is colliding protons at lower energies than usual: http://cern.ch/go/vBv7
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Find out why the Large Hadron Collider is colliding protons at lower energies than usual: http://cern.ch/go/vBv7
Image credit: Maximilien Brice/CERN © CERN – for terms of use see http://cern.ch/copyright