Simple, Inexpensive Magnetic Levitation: The Flight of the Humble "Flea"

From flying broomsticks to floating cities and container-less storage, levitation has a tendency to capture the imagination. Among the impractical and impossible ideas, there are some good ones that have already taken hold. Maglev trains now carry passengers in Japan, South Korea, and China, and have been proposed in countries across the world. Fun (but less useful)hoverboards operate on similar technology, as do magnetic bearings used in industrial machinery.In an upcoming issue of the American...