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  1. Humans

    From the June 12, 1937, issue

    Waterflow downstream of a dam, the shape of an asteroid, and connections between wallpaper patterns and crystal structures.

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  2. The Green Guide

    National Geographic’s Green Guide offers objective information and practical advice to consumers on how to lead a greener life. Go to: http://www.thegreenguide.com

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  3. Math

    Summing Up Literature

    Statistical analyses of literary texts provide new insights about novels.

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  4. Borderline Aid: Psychotherapy soothes personality ailment

    Three forms of psychotherapy each provide substantial relief from symptoms of borderline personality disorder.

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  5. Planetary Science

    Shifting Ocean: Tipsy Mars may explain undulating shoreline

    Evidence that Mars once had a vast ocean gains support from a proposal that the planet was tipped halfway over on its side several billion years ago.