Mixed reception for magnetic monopole announcement
Gloria B. Lubkin · Physics Today · 1975
The possibility that a fundamental magnetic charge might exist has intrigued physicists over the years. After the quantum theory of the magnetic monopole was developed in 1931 by P. A. M. Dirac, experimenters began looking for them. They have searched in cosmic rays, at particle accelerators, in iron ore, ocean sediment, meteorites and lunar rock.