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  1. Humans

    From the September 21, 1935, issue

    The opening of the Hayden planetarium in New York, heavy neon, and the age of the universe.

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  2. Math

    Math Music

    Curious about the sounds of pi, the music of Fibonacci numbers, the blare of chaos, or the chimes of a DNA sequence? This interactive Web site, developed by Jonathan Middleton and his team at Eastern Washington University, provides a variety of tools for composing music based on mathematical recipes that convert sequences of numbers into […]

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  3. Health & Medicine

    Sharpening the focus of mammograms

    Digital mammography can detect up to one-fourth more cancers than traditional film mammography can in women who are under 50, haven't gone through menopause, or who have dense breast tissue.