(FILES) TOSome of the 1232 dipole magnets that bend the path of accelerated protons are pictured in the Large Hadron Collider (LHC) in a tunnel of the European Organisation for Nuclear Research (CERN), during maintenance works on February 6, 2020 in Echenevex, France, near Geneva. The world's largest particle accelerator, at CERN, is beginning a four-year shutdown on June 29, 2026 for an upgrade aimed at significantly increasing its ability to produce collisions, in the hope of shedding light on one of the greatest mysteries of the Universe: dark matter. (Photo by VALENTIN FLAURAUD / AFP via Getty Images)