News

  1. Astronomy

    To determine stars’ physical traits, Kepler sees the light

    Measuring stellar brightness can yield useful estimates of stars' size and evolutionary stage, and help in the hunt for planets.

    By Andrew Grant
  2. Animals

    For sheep horns, bigger is not better

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

    By Jessica Shugart
  3. Life

    Bacteria can cause pain on their own

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

    By Cristy Gelling
  4. 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.