Scientists Discover Magnets That Have Only One Pole...
Scientists have long speculated about the existenc... ...team has found evidence of the existence of these monopoles in certain rare-materials known as "spin ices":... ...e along the string, acting as—voilà—magnetic monopoles
https://www.neatorama.com/2009/09/05/scientists-discover-magnets-that-have-only-one-pole/
