Number 71 (Story #2), March 13, 1992 by Phillip F. Schewe and Ben Stein BLUE DWARF GALAXIES seem to have been the predominant type of galaxy several billion years ago. This notion, based on infrared observations recorded by Lennox Cowie of the University of Hawaii late last year, have caused cosmologists to rethink the sequence of galaxy evolution. The chief question is what happened to the blue dwarfs. Did they merge into the much larger galaxies we now see, or are they still out there but so dim as to be undetectable? Cowie plans to search for other galaxies that may have co-existed with the blue dwarfs. (Science, 28 February 1992.)