*QI Magic: we’ve got here a piece of ordinary-looking black ceramic, which, when we cool it down to very low temperatures, acquires a very extraordinary property. it loses all its resistance, its electrical resistance, and becomes what’s known as a super-conductor. and the other thing is that it acquires the property that it can bend magnetic field lines in such a way that it will always try to resist any motion, even if that means hovering above the ground.