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  1. Humans

    From the July 25, 1936, issue

    A tricky flower photo, insect hearing, and sleeping oysters.

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  2. Cool Science for Kids

    This Web site, produced by the Howard Hughes Medical Institute, provides hands-on science activities for elementary-school students. It uses animation, sound, quizzes, and other techniques to encourage kids to explore biology. Activities include building a model of a butterfly emerging from a cocoon and identifying which parts of plants belong in the family salad bowl. […]

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  3. Health & Medicine

    Freeing Up the Flow: Clearing neck-artery blockage diminishes signs of depression in elderly

    Propping open a clogged carotid artery may ease symptoms of depression in elderly people.