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  1. Health & Medicine

    Ultrasound’s New Focus

    No longer limiting the use of sound waves to diagnostic medicine, researchers are studying high-intensity focused ultrasound as a treatment for uterine fibroids, breast cancer, prostate cancer, and other cancers.

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  2. Math

    Papercraft Polyhedra

    Constructing intricate polyhedra requires considerable skill and artistry. For more math, visit the MathTrek blog.

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  3. Humans

    From the April 18, 1936, issue

    A spooky museum at night and heredity as a cause of cancer.

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  4. Finding Form

    Biologist Sean Carroll maintains a site devoted to the genetics of animal body designs and evolution. Read about advances in the emerging field of evolutionary developmental biology and watch brief movies of embryo formation in fruit flies, butterfly wing development, and other natural wonders.