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      Space & Physics

      The Earth

      The outstanding feature of our own planet is the dynamic activity of its atmosphere and its crust. Both have been substantially altered by the evolution of living organisms

      • By Raymond Siever on September 1, 1975
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      ABOUT THE AUTHOR(S)

        Recent Articles by Raymond Siever

        • The Dynamic Earth
        • The Steady State of the Earth's Crust, Atmosphere and Oceans
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