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  1. Math

    Perfect Magic Cubes

    A magic cube is a three-dimensional array of whole numbers, in which each row, column, and body diagonal (corner to corner, through the center) adds up to the same total. A perfect magic cube is one in which the diagonals of each vertical or horizontal slice through the cube also sum to the same value. […]

    By Ivars Peterson
  2. Tech

    Gene Screen: Ultrasensitive nanowires catch mutations

    Researchers have devised a nanowire sensor that binds to DNA molecules and produces an electrical signal almost instantaneously.

    By Alexandra Goho
  3. Health & Medicine

    Pivotal Protein: Inhibiting immune compound slows sepsis

    By restraining the action of an immune system protein that can run amok, scientists experimenting on mice have reversed the course of severe sepsis.