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  1. Humans

    From the October 5, 1935, issue

    A mammoth skull and losing teeth through evolution and diet.

    By Science News

  2. Monarchs in the Classroom

    Learn about monarch butterflies and the “Monarchs in the Classroom” program at this Web site from the University of Minnesota. The site provides information on the life cycle of monarch butterflies and their global distribution. Research pages highlight topics of current interest. There’s also information on how to rear monarchs. Go to: http://www.monarchlab.umn.edu/

    By Science News
  3. Earth

    Fertility and Pollution: Dirty air, ozone linked to sperm troubles

    Men develop lower sperm counts and produce more sperm with fragmented DNA when the air has higher levels of ozone and other pollutants.