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  1. Math

    Covering New Ground with Polygons

    Mathematicians can cover larger areas than they'd realized using polygons with fixed diameters.

    By Julie Rehmeyer
  2. Humans

    Letters from the May 26, 2007, issue of Science News

    It’s cold out there I couldn’t help noticing the last sentence of “World’s climate map gets an update” (SN: 3/24/07, p. 190): “One of the system’s 30 possible climate subtypes—a temperate climate with a cold, dry summer—wasn’t found anywhere on Earth.” The comment reveals that the writer has never read Mark Twain’s comment that the […]

    By Science News
  3. Humans

    From the May 15, 1937, issue

    A new seat of learning, hazards to workers, and a machine with feeling.