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  1. Physics

    Intergalactic magnetism runs deep and wide

    Mounting evidence that magnetic fields of surprising strength permeate intergalactic space raises questions about how the fields form and what effects they have.

    By Peter Weiss
  2. Health & Medicine

    Drug Eases Bone Cancer Pain in Mice

    Pain caused by bone cancer in mice can be alleviated somewhat by osteoprotegerin, a drug being tested for osteoporosis, suggesting a possible new treatment for people with this cancer.

    By Nathan Seppa
  3. Math

    Changes of Mathematical State

    Untangling a web of conflicting demands can be tough on computers.

    By Ivars Peterson
  4. Humans

    From the May 3, 1930, issue

    MOON’S SHADOW AT ECLIPSE PHOTOGRAPHED Clouds over the sun broke away at Camptonville, Yuba County, California, two minutes before the total phase of the solar eclipse of the sun.