Number 149 (Story #3), October 28, 1993 by Phillip F. Schewe and Ben Stein COLD CESIUM ATOMS BOUNCE UP TO EIGHT TIMES in a new atomic mirror. Scientists at the College de France in Paris use evanescent light, the electromagnetic field at the surface of a piece of curved glass in which laser light is undergoing total internal reflection, to reflect cesium atoms dropped from above. Previous demonstrations of atomic mirrors had been limited to one or two bounces. The development of such a mirror is the first step toward creating a Fabry-Perot- type interferometer for atom waves. (C.G. Aminoff et al., 8 Nov. Physical Review Letters.)