A new study circumvents a 178-year-old theory. Scientists have figured out a way to create and cancel magnetic fields from afar. The method involves running electric current through a special arrangement of wires to create a magnetic field that looks as if it came from another source. "We create the illusion of having this source at a distance," Mach-Batlle said. The researchers published their findings Oct. 23 in the journal Physical Review Letters.