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      Knowledge is Power

      Scientific American February 1998

      Greenland Ice Cores: Frozen in Time

      Ice, frozen in place for tens of thousands of years, provides scientists with clues to past—and future—climate

      • By Richard B. Alley, Michael L. Bender on February 1, 1998

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      More in the February 1998 issue of Scientific American
      • Boom Box
      • Errata
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