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  1. Math

    The Shape of Space

    The debate over the shape of space has taken some new twists with the analysis of satellite snapshots of the universe's temperature waves.

    By Erica Klarreich
  2. 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
  3. 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.