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  1. Humans

    Letters from the March 11, 2006, issue of Science News

    Seasonal effect? Might your article, “Bright Lights, Big Cancer” (SN: 1/7/06, p. 8), on breast cancer have missed something? If the daily light-dark cycle affects melatonin, is there a seasonal change in cancer rates in the Northern (and Southern) Hemispheres? If so or not, that might give a clue to any latency period. Alan MacGregorSalmon […]

    By Science News
  2. Health & Medicine

    Genes for macular degeneration

    Variations in two genes could account for three-quarters of all cases of age-related macular degeneration.

    By Christen Brownlee
  3. Health & Medicine

    Low-protein diet boosts treatment

    A diet low in protein can improve the effectiveness of drug therapy and reduce the periods of the most debilitating symptoms suffered by Parkinson's disease patients.