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A magnetic monopole is a hypothetical particle in particle physics that is a magnet with only one magnetic pole (a north pole without a south pole or the other way around). Scientists are interested in this, as they are predicted in several particle theories, such as grand unified and superstring. Magnetism in normal bar magnets and electromagnets does not come from magnetic monopoles. There is not enough evidence to even be sure that magnetic monopoles exist in this universe.
- Dark Cosmos: In Search of Our Universe's Missing Mass and Energy, by Dan Hooper, p192
- Particle Data Group summary of magnetic monopole search
- Wen, Xiao-Gang; Witten, Edward, Electric and magnetic charges in superstring models,Nuclear Physics B, Volume 261, p. 651-677
- S. Coleman, The Magnetic Monopole 50 years Later, reprinted in Aspects of Symmetry