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  1. A tip of the tongue to the brain

    Researchers have identified several brain areas that together underlie the experience of feeling certain that a piece of forgotten information is nonetheless on the tip of one's tongue.

    By Bruce Bower

  2. Audiovisual aids may lessen dyslexia

    A short training course in matching sound sequences with visual patterns shows promise as a way to boost reading skills in children with dyslexia.

    By Bruce Bower

  3. Seabird makes citrusy bug repellant

    Auklet feathers carry a cocktail of citrus-smelling chemicals, including compounds that squashbugs secrete to repel predators.

    By Susan Milius

  4. Geneticists define new elephant species

    A new study of the genetics of African elephants shows that forest dwellers differ so much from those roaming the savannas that the two may be separate species.