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  1. Health & Medicine

    Indigestion drug makes headway

    An experimental drug relieves symptoms of a form of chronic indigestion called functional dyspepsia better than a placebo does.

    By Nathan Seppa
  2. Astronomy

    Peeling Back Orion’s Layers

    By studying the most detailed portrait ever assembled of the Orion nebula, astronomers hope to glean new insights about star birth throughout the galaxy.

    By Ron Cowen
  3. Math

    All Square

    Mathematicians nail down when it's possible to express numbers as the sums of squares.

    By Ivars Peterson
  4. Math

    The Limits of Mathematics

    Some mathematical facts can't be compressed into a theory because they are too complicated.

    By Ivars Peterson
  5. Humans

    From the February 29, 1936, issue

    Giant pandas on display, keeping organs alive, and light from the night sky.