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  1. Humans

    Letters from the March 19, 2005, issue of Science News

    Chew on this As an occasional betel nut chewer, I note that the report “Palm-Nut Problem” (SN: 1/15/05, p. 43) doesn’t touch on possible positive aspects of the habit. Chewing sapari (coarsely powdered, sweetened, and clove-flavored areca nut) at the end of a meal leads to a sense of satisfaction and well-being, induces salivation, and […]

    By Science News
  2. Earth

    A Whiff of Danger

    Synthetic fragrance chemicals can inhibit the activity of molecules that cells depend on to eject harmful substances.

    By Ben Harder

  3. 19530

    This article ends with the remark, “overall, ‘coercion plays a more important role than kinship in favoring cooperation in insect societies.'”