The magic doubles with the Meissner effect: superconductors don’t just conduct perfectly -- they also expel magnetic fields from its interior. Picture this: place a magnet on a normal plate, and it falls. But if you replace the plate with a superconductor cooled below its critical temperature, the magnet would levitate mid-air, as if cloaked in an “invisibility shield” that repels magnetic field lines. This is the fundamental principle behind maglev trains.
