Number 42 (Story #3), July 24, 1991 by Phillip F. Schewe and Ben Stein TEN NEW MILLISECOND PULSARS have been discovered in a single globular cluster by an Australian-British-Italian team. There were only 13 known pulsars of this type, scattered in 12 other globular clusters, prior to this discovery. These pulsars, 13,000 light years away in cluster 47 Tucanae, spin so fast that they complete revolutions in milliseconds and spew radio pulses and other types of radiation at precisely-timed intervals. Because they are extremely sensitive to gravitational forces, the pulsars are expected to provide insight into the composition of the globular cluster's core, believed to be composed of old neutron stars. Indeed, millisecond pulsars are believed to form when a dying neutron star is given new life---and sped up considerably---by matter drifting in from a lighter stellar neighbor. But only one of these star systems has been detected in 47 Tucanae, casting doubt on this explanation, or at the very least setting relatively short life spans for these suspected precursors of the pulsar. (Nature, 18 July 1991.)