Scientific American March 1983The Future of the UniverseA forecast for the expanding universe through the year 10100: All protons will decay, galaxies will form black holes and black holes will "evaporate." If the universe collapses, it may cycleBy Duane A. Dicus, John R. Letaw, Doris C. Teplitz, Vigdor L. Teplitz on March 1, 1983