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  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. Health & Medicine

    Predicting Prostate Cancer’s Moves

    To guide treatment decisions in individual cases of prostate cancer, medical researchers are using gene-expression profiling and other novel techniques to develop better predictive markers of how a given tumor will behave.