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  1. Physics

    Atom microchips get off the ground

    Becoming smaller and more versatile, microchips using atoms instead of electrons promise both to improve atomic physics experiments and to pave the way for new technologies such as quantum computers.

    By Peter Weiss
  2. Math

    Super Bowls and stock markets

    The predictive power of the Super Bowl "theory," which involves an apparent correlation between stock market performance and the results of the National Football League championship game, has declined precipitously in recent years.

    By Ivars Peterson
  3. Math

    Pursuing punctured polyhedra

    A mathematician has proved that it's possible to construct a mathematical shape made up of flat faces and straight edges in which every face has a "hole" where the vertex of one constituent polyhedron pokes into the face of another.