News

  1. Tech

    High-flying wing destroyed in crash

    The unmanned NASA aircraft that holds the world record for high-altitude flight without rocket propulsion recently broke up over the Pacific Ocean.

    By Peter Weiss
  2. Health & Medicine

    Drug reduces risks for dialysis patients

    Kidney-dialysis patients getting the vitamin D drug paricalcitol survive longer than those getting a similar medication called calcitriol.

    By Nathan Seppa
  3. Astronomy

    Stellar speed limit

    Ripples in the fabric of space-time may put the brakes on the fastest-spinning stars in the universe and prevent them from flying apart.

    By Ron Cowen
  4. Earth

    Not So Green? Using hydrogen as fuel may hurt environment

    Replacing fossil fuels with clean-burning hydrogen—considered to be a way to reduce globe-warming carbon dioxide—may create a different set of environmental problems, including larger and longer-lasting ozone holes.