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  1. Astronomy

    Super Wallops: Tracking the origin of cosmic rays

    Two new studies shed light on the longstanding mystery of where cosmic rays—the energetic charged particles that bombard our galaxy—originate.

    By Ron Cowen
  2. Health & Medicine

    Risk Factor: Genetic defect hikes breast cancer threat

    A mutation already linked to several types of cancer doubles the risk of breast cancer in a woman and multiplies men's slight risk of the disease even more dramatically.

    By Nathan Seppa
  3. Health & Medicine

    Put Out to Pasture: Strategy to prolong antibiotics’ potency

    The use of antibiotics to promote growth in farm animals hastens the end of their medical effectiveness.

    By Ben Harder
  4. Health & Medicine

    Shocking findings

    Implanted defibrillators reduce the occurrence of sudden death by about a third among people who had previous heart attacks and continue to suffer impaired heart function.