Letters to the Editor

  1. Humans

    Letters from the June 3, 2006, issue of Science News

    Latitude adjustments “Shafts of snow sculpted by sun” (SN: 4/1/06, p. 206) doesn’t say that penitentes appear only in the Andes, nor does it say in what part of the Andes they appear. Does the formation of penitentes require that the sun be nearly directly overhead for part of the day? Can penitentes form only […]

    By
  2. 19685

    When I looked at the photo in this article, I didn’t see a “pentagonal shape” in the swirling water. I saw a sine wave, wrapped around a circle. I was immediately reminded of the Bohr–de Broglie model of electron orbits forming standing waves.