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      Knowledge is Power

      Scientific American April 1992

      A Second Glance

      A dim class of galaxies offers unexpected fascination

      • By Corey S. Powel on April 1, 1992

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      More in the April 1992 issue of Scientific American
      • Ballpark Physics
      • First-Class Culprit
      • Solid Acid Catalysts
      View Full Contents
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