and it may soon be possible to build permanent magnets as strong as neodymium magnets, but without any rare earth metals. In fact, the only thing needed to make them is iron and nitrogen ...

Old TVs and computer monitors used cathode-ray tubes (CRTs), and they relied on electron beams guided by magnetic fields to create images. So, a strong magnet nearby could throw those beams off ...

A strong magnetic field can act as a shield, preventing solar wind to strip away a planet's atmosphere, but it also can accelerate charged particles or atoms, projecting them into outer space.