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      Knowledge is Power

      Scientific American October 2001

      Sound Judgments

      Will a Powerful New Navy Sonar Harm Whales?

      • By Wendy Williams on October 1, 2001

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      More in the October 2001 issue of Scientific American
      • 50, 100 and 150 Years Ago
      • Magnetic Revelations
      • Catching Some Sun
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