Number 21 (Story #3), February 13, 1991 by Phillip F. Schewe and Ben Stein DOES DARK MATTER CONSIST OF BARYONS? Joseph Silk of the University of California at Berkeley (415-642-2113) believes that compact stellar remnants such as neutron stars and white dwarfs (objects made from baryonic matter like protons and neutrons) rather than the hypothesized weakly interacting massive particles may account for much of the missing mass in galaxy halos and clusters. He suggests ways of testing this theory. (Science, 1 Feb. 1991.)