Video courtesy of the Association of Science-Technology Centers (ASTC), representing the science center and museum field worldwide. To learn more, visit www.astc.org. Follow us on Twitter: @ScienceCenters. Tel-Aviv University demos quantum superconductors locked in a magnetic field (www.quantumlevitation.com). For an explanation of the physics behind this demonstration, visit www.quantumlevitation.com/levitation/The_physics.html. With the theme "Knowledge that Works: From Theory to Practice," the 2011 ASTC Annual Conference featured more than 100 sessions, which highlighted how science centers and museums are putting new ideas to practical use to serve their communities. The conference was hosted by the Maryland Science Center in Baltimore, October 15-18.