I'm an IT person - non-scientist - but this problem has challenged me ever since high school physics: If two permanent magnets - pole to like pole - repel each other, the magnet suspended possesses potential energy. If a material can be found (that is non-magnetic and without any power source) that can disrupt the magnetic lines of force between the two magnets to where the magnets' separation decreases, then gravity would be providing the second source of energy (kinetic energy). You would basically have a new form of motor. Would it really be considered a perpetual motion device since gravitity and magnetism are both supplying energy? It seems like new materials are being developed everyday. I just read about pyrolytic carbon and diamagnetism. Has something (not yet tried) been developed recently that can address this question? Is it just not feasible?