Uncategorized

  1. Animals

    Magnetic field tells nightingales to binge

    Young birds that have never migrated before may take a cue from the magnetic field to fatten up before trying to fly over the Sahara.

    By Susan Milius
  2. Health & Medicine

    Even high-normal blood pressure is too high

    Blood pressure at the high end of what is defined as the normal range is closer to "high" than to "normal" in terms of risk of associated heart disease.

    By Ben Harder
  3. Astronomy

    X-ray study: Energy from a black hole?

    Astronomers claim that for the first time, they've observed energy extracted from a black hole, or more precisely, from the tornadolike swirl of surrounding space that a spinning black hole drags along with it.