News

  1. Tech

    Itsy chain turns bitsy gears

    A tiny chain with links the size of biological cells offers a new way to deliver power to micromachines.

    By Peter Weiss

  2. Disorder Decline: U.S. mental ills take controversial dip

    Far fewer people suffer from mental disorders requiring treatment than was initially indicated by two national surveys.

    By Bruce Bower

  3. Cool Discovery: Menthol triggers cold-sensing protein

    A cell-surface protein that lets ions flow into cells responds to menthol and cool temperatures.

    By John Travis
  4. Astronomy

    X-Ray Universe: Quasar’s jet goes the distance

    Collisions with photons left over from the birth of the universe appear to have generated the longest X ray-emitting jet ever found in a distant galaxy.