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  1. Life

    Tastes like metal

    Scientists have discovered that proteins that help sense sweet and spice also help taste metals.

    By Tina Hesman Saey
  2. Math

    Mathematician answers Supreme Court plea

    New, fair method for dividing states into congressional districts could reduce political squabbles.

    By Julie Rehmeyer
  3. Health & Medicine

    B vitamins, folic acid may protect vision

    Vitamin B and folic acid supplements might defend against macular degeneration, the leading cause of blindness in the elderly.

    By Nathan Seppa
  4. Health & Medicine

    Sunshine vitamin diminishes risk of colds, flu

    A study of nearly 19,000 adults shows that people with low levels of vitamin D are more likely to develop colds, flu and pneumonia.