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  1. Earth

    Tornado Alley, USA

    A new model that simulates 30,000 years worth of tornadoes in the United States finds that the place not to be if you fear funnel clouds is southeastern Oklahoma, where any particular spot can expect to get damaged once every 4,000 years.

    By Sid Perkins
  2. Math

    Filling In Blanks

    Researchers are developing automated methods based on differential equations to reduce the time and effort required to fix digital images, not only to fill in blank areas but also to remove extraneous objects.

    By Ivars Peterson

  3. From the May 7, 1932, issue

    MONKEYS GET BALD LIKE MEN It is no longer fair to blame your barber or beautician for that bald spot; nor can you lay your gray hairs onto worry over your childrens naughtiness or your brokers shortsightedness.