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  1. Tech

    Quantum-Dot Leap

    Multiple electrons from photons in quantum dots could be a boon to solar cells and other technologies.

    By Peter Weiss
  2. Math

    A Straw and Two Glasses

    Using a straw to transfer water between two glasses raises intriguing mathematical questions. For more math, visit the MathTrek blog.

    By Ivars Peterson
  3. Humans

    Letters from the May 27, 2006, issue of Science News

    Dig it or don’t I am rather surprised at all the attention this find is getting (“Out of the Shadows: Not all early mammals were shy and retiring,” SN: 3/18/06, p. 173). Some would think that these mammals caused the downfall of the dinosaurs, but the fossil record suggests a very different scenario.