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  1. Losing Rhythm: Gene mutation causes heart problems

    Chinese researchers have for the first time identified a genetic defect that causes atrial fibrillation, a disorder in which the heart's upper chambers beat irregularly and too rapidly.

    By John Travis
  2. Humans

    Science Revalued: Report seeks revived Smithsonian science

    A long-awaited report on science at the Smithsonian Institution calls urgently for more funding and also recommends preservation of beseiged materials-research center.

    By Susan Milius

  3. Bipolar Math Subtractions: Mental disorder may spur math problems in teens

    A new study suggests that bipolar disorder, a psychiatric illness best known for its stormy mood swings, may frequently undermine mathematical reasoning as well.

    By Bruce Bower

  4. 19176

    Your article tells us there are 65 times fewer deaths per mile traveled in flying commercial aircraft than in driving.