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  1. Astronomy

    Studies of Light and Shadow

    Two new surveys of the night sky examine the two facets of galaxy formation: the glitter and the gloom.

    By Ron Cowen
  2. Humans

    Letters from the February 24, 2007, issue of Science News

    No piece of cake The new mathematical method for equitable cake sharing (“A Fair Slice: New method makes for equitable eating,” SN: 12/16/06, p. 390) actually leads to a version of Zeno’s paradox. The problem is that the cake remnant left after the referee gives the two eaters their respective, equally valued pieces is no […]

    By Science News
  3. Humans

    From the February 13, 1937, issue

    A model for flood control and a 1-ton robot that solves equations.