Uncategorized

  1. Math

    Strolling Down Möbius Lane

    The Möbius band is a fascinating object. You can make a simple model of it by joining the ends of a long, narrow strip of paper after giving one end a 180-degree twist. The result is a one-sided, one-edged surface in the form a single closed continuous curve with a twist. A Möbius band. A […]

    By Ivars Peterson
  2. Humans

    From the October 28, 1933, issue

    WEATHERMEN UNWITTINGLY POSE HALLOWEEN PICTURE Not ancient warlocks making weather but modern scientists just making a record of it, unintentionally posed a good Halloween picture on the top of Mount Washington, with the aid of a cat that doesn’t like the wind. The photograph has nothing of the mellowness of autumn about it–quite naturally, since […]

    By Science News
  3. Materials Science

    Water Repellency Goes Nano: Carpet of carbon nanotubes cleans itself

    Forests of carbon nanotubes coated with Teflon yield a superhydrophobic material—the ultimate self-cleaning surface.