John L. Hall, a fellow and senior research associate at JILA, a joint institute of the University of Colorado at Boulder and the National Institute of Standards and Technology, has been awarded the 2005 Nobel Prize in Physics. Hall, 71, shared the Nobel with Theodor W. Hänsch of the Max Planck Institute for Quantum Optics and a professor of physics at Ludwig Maximilians University in Munich, Germany, and Roy J. Glauber, a professor of physics at Harvard University.