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  1. 19068

    If an animal can boost its immune system in response to shortening days, why would it not keep its immune system operating at that higher level all the time? Is there some physiological cost to maintaining a higher level of immune response? Michael LehnerGreenfield, N.H. According to Staci D. Bilbo of Johns Hopkins University in […]

    By Science News
  2. Animals

    Cold Hamsters: Wild species boosts immunity for winter

    Hamsters that have to survive winter outdoors in Siberia rev up their immune systems, including their response to psychological stress, when days grow short.

    By Susan Milius
  3. Earth

    A Confluence of Contaminants: Streams’ organic mix may pose environmental risk

    The combined effects of at least some of several dozen organic contaminants newly identified in U.S.