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  1. 18929

    Your article on the importance to an elephant family of having as its leader a matriarch of considerable age reminded me of the postulation that one of the reasons menopause evolved in humans was to allow some women to survive to old age. In preliterate societies, old people were the libraries. Some of the knowledge […]

    By Science News

  2. Friend or Foe? Old Elephants Know

    Older female elephants are far better at telling friends from strangers than are younger matriarchs.

    By Susan Milius

  3. Radioactive antibodies on the mind

    Injecting radioactive antibodies directly into the cavity left after a brain tumor is surgically removed lengthened patients' lives by as much as 40 weeks in a recent study.