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  1. Humans

    From the March 21, 1936, issue

    An arctic myth debunked, a treatment for high blood pressure, and a radio tube with no filament.

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  2. Digital Dissection

    The same medical technology used to image brain tumors and torn knee ligaments is taking the field of marine biology to a new dimension by allowing anyone with Internet access to examine fish as never before. This Web page describes how researchers at the University of California, San Diego’s Keck Center for Functional Magnetic Resonance […]

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  3. Astronomy

    Comet Sampler: Fire meets ice

    The first study of comet dust brought to Earth by a spacecraft has revealed several minerals that could have formed only at the fiery temperatures close to the sun or another star.