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  • PDF preview of Caves and Karst crossword.
    After reading the Caves and Karst edition of Natural Inquirer, test your knowledge with a crossword puzzle.
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    Crossword – Caves and Karst

  • The cover for the 'Tropic Topic' article. The main image is a photo of exposed limestone karst pavement.
    The scientists in this study wanted to compare the chemistry of soils and leaves in Puerto Rico’s northern wet and…
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    Tropic Topic: What Is Known About the Limestone Zone?