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  1. Essence of g

    New efforts to probe the biology of intelligence stir up a long-running controversy over what mental tests actually measure.

    By Bruce Bower

  2. Genghis Khan’s Legacy?

    Genghis Kahn's military success 800 years ago may have spread a particular form of the Y chromosome, one he may have himself carried.

    By John Travis

  3. 19173

    Erik Trinkaus argues that fossil evidence shows signs of considerable interbreeding of Neandertals and modern humans. However, I don’t believe that proves we could have Neandertal ancestors. Couldn’t crossbreeding result in sterile offspring, such as is seen in mules? Anne Wittke Flagstaff, Ariz. Sure. Trinkaus argues, however, that the presence of Neandertal traits on the […]

    By Science News

  4. 19162

    I think that your readers should be aware that this article on beach erosion is based upon a report by the Heinz Center for Science that’s being widely disputed.