Number 1 (Story #4), September 28, 1990 by Phillip F. Schewe and Ben Stein GRAVITATIONAL-WAVE ASTRONOMY may truly come into being in the next few years with the advent of new facilities such as the Caltech-MIT Laser Interferometer Gravitational Wave Observatory. So far only indirect evidence for gravitational waves can be inferred, in this case from the decaying mutual orbit of the two neutron stars in the pulsar system PSR 1913+16. (Mosaic Magazine, Summer 1990, published by the NSF)