Uncategorized

  1. Math

    Möbius and his Band

    Making a Möbius strip. A Möbius band (or strip) is an intriguing surface with only one side and one edge. You can make one by joining the two ends of a long strip of paper after giving one end a 180-degree twist. An ant can crawl from any point on such a surface to any […]

    By Ivars Peterson
  2. Earth

    Kilauea: 20 years on, it’s still erupting

    As of Jan. 3, Kilauea—Hawaii’s Energizer Bunny of volcanic activity—has been erupting continuously for two decades.

    By Sid Perkins
  3. Chemistry

    Sea bacteria may be new anticancer resource

    Researchers examining deep-sea sediments have uncovered a large source of previously unknown bacteria that appear to produce disease-fighting chemicals.