Members of the Quantum Machines Unit at OIST have demonstrated in principle a macroscopic, diamagnetically levitating rotor that does away with the long-standing problem of eddy-current damping in magnetic levitation, a phenomenon where currents of electrons create opposing magnetic fields in the material that resist motion a bit like frictional drag, slowing it down. The research is published in Communication Physics. Slowed only by air friction, this disk has exciting applications in ultraprec