Number 2 (Story #2), October 4, 1990 by Phillip F. Schewe and Ben Stein LASER COOLING DOWN TO MICROKELVIN temperatures is now possible. The lowest kinetic-temperatures ever measured for a sample of atoms using a laser cooling device is 2.5 microkelvins, achieved at the Ecole Normale Superieure with cesium atoms. (Physics Today, October 1990; contact William Phillips at NIST, 301-975-6554)