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Black hole event, ATLAS detector montage. Illustration of a 'black hole' event, combined with a photograph of the ATLAS detector at CERN. ATLAS (A Toroidal LHC Apparatus) is one of seven particle detectors constructed at CERN's Large Hadron Collider (LHC). The LHC, the world's largest and most powerful particle collider, began operating in 2008 at CERN, the European particle physics laboratory. Results from ATLAS, the size of a 5-storey building, helped discover a particle consistent with the Higgs boson in 2012. Microscopic black holes produced in particle collisions here would decay immediately into many particles (tracks shown). Photographed on 23 April 2014. (KEYSTONE/SCIENCE PHOTO LIBRARY/CERN/SCIENCE PHOTO LIBRARY)