A magnetic monopole is an isolated magnetic pole -- north without south, or south without north. Every magnet you have ever encountered has both poles. The monopole would have just one.
Paul Dirac showed in 1931 that if even one monopole exists anywhere in the universe, it would explain why electric charge comes in discrete units. One particle, solving one of the deepest puzzles in physics.
For nearly a century, physicists have searched for monopoles. In cosmic rays, at particle accelerators, in ancient rocks. The hunt continues at CERN with the MoEDAL experiment, a detector designed specifically to catch these elusive particles.
In 2009, scientists found "emergent" monopoles in exotic ice crystals called spin ice. Not fundamental particles, but collective behaviors that act like monopoles. Nature finding a way to make the impossible almost possible.
At the center of every magnetic field is a question: what if the symmetry were complete? Monopole answers that question by existing at the boundary between the known and the possible -- the center where theory meets experiment, where mathematics meets matter.
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