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  1. Health & Medicine

    Microbes implicated in heart disease

    Viruses and bacteria besides chlamydia may play a role in human heart disease through an immune reaction to a heartlike protein they produce.

    By John Travis
  2. Health & Medicine

    Genes of cholera germ deciphered

    The bacterium that causes cholera has nearly 4,000 genes on its two circular chromosomes.

    By John Travis

  3. Feedback matters for getting the joke

    Plausible information about how others react to jokes colors a college student's own perception of the humor value of the material.

    By Ruth Bennett

  4. In gauging beauty, congeniality counts

    People judge others who have positive personality traits by more lenient physical criteria for attractiveness than they do those about whom they have no personality information.