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  1. Anthropology

    Ishi’s Long Road Home

    The reappearance of a California Indian's preserved brain, held at the Smithsonian Institution since 1917, triggers debate over the ethics of anthropological research and the repatriation process.

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  2. Materials Science

    Tiny gems on steps find future in films

    The discovery of diamond-crystal seeds on steps in silicon may lead to long-sought, large wafers of pure, single-crystal diamond for electronics and other uses.

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  3. 19011

    I was surprised to learn that scientists have yet to solve the secret of why the moon looks larger when rising. Years ago, I was told by a teacher that the moon looks biggest when rising (or setting) because the observer is looking through more atmosphere, and thus its light is scattered more, changing its […]

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  4. The moon also rises—and assumes new sizes

    The perplexing human tendency to perceive a moon on the horizon as larger than an elevated moon may arise from visual cues indicating that the horizon moon is located much farther away.