You’ve seen it before in any fantasy book or flick: The wizard totally flips his lid and begins to levitate, tearing up the place with spells. Levitation is possible in the real world thanks to, among other principles, diamagnetism. The wizard, like most matter, is made of atoms encircled by electrons. If our magically inclined friend were to find himself in a magnetic field, the atoms’ electrons would shift and generate a field of their own. Also aiding the wizard’s levitation is the fact that his body is two thirds water—conducive to the process. One issue remains, though: Ideal magnetic conditions aren’t exactly handy, especially in a pinch.