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Even more of a miracle, perhaps, is the comet itself. At a moment in history when mankind seems more inclined to look inward at parochial problems, Kohoutek is a reminder of great events —and even greater mysteries—far beyond earth. How was our solar system formed? What changes will occur in the next several billion years—before the sun's nuclear fires go out? How did life begin? The comet Kohoutek may well offer clues, if not answers to some or all of these questions. If it does, it will prove that it is indeed a messenger—of light and knowledge for all mankind.