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  1. Health & Medicine

    Linking stress and senility

    A gene that's active in the brain may help explain why emotional stress seems to increase a person's likelihood of getting Alzheimer's disease.

    By Patrick Barry
  2. Humans

    Letters from the July 7, 2007, issue of Science News

    Hex sine? The NASA researchers baffled by the hexagonal shape in Saturn’s soupy atmosphere at its northern pole (“A hexagon on the ringed planet,” SN: 4/28/07, p. 269) should read “As waters part, polygons appear” (SN: 6/3/06, p. 348). It is worth investigating whether there is a similar phenomenon—I still suspect some sort of standing […]

    By Science News
  3. Earth

    Icebergs can be biological hot spots

    Icebergs carry nutrients from the land and shed them into the sea, nourishing life in the frigid waters near Antarctica.