News

  1. Animals

    For sheep horns, bigger is not better

    Trade-offs between studliness and survival keep less endowed sheep in the mix.

    By Jessica Shugart
  2. Life

    Bacteria can cause pain on their own

    Microbes caused discomfort in mice by activating nerves, not the immune system.

    By Cristy Gelling
  3. Animals

    Birds know road speed limits

    Crows, house sparrows and other species judge when to flee the asphalt by average traffic rates rather than an oncoming car's speed.

    By Susan Milius
  4. Psychology

    Blood marker may predict suicide

    People who killed themselves had higher levels of a gene involved in cell death.

    By Laura Sanders
  5. Health & Medicine

    Power of sugar may come from the mind

    Only people who believe exertion zaps willpower get a boost from glucose.