News

  1. Space

    New hints of saltwater on Mars

    Seasonal patterns consistent with briny seeps on the Red Planet, a new study concludes.

    By Camille M. Carlisle
  2. Life

    How exercise benefits nerve cells

    Activity stimulates production of a neural insulation that moves messages faster.

    By Laura Sanders
  3. Health & Medicine

    Urine test may improve prostate screening

    Levels of two biomarkers might clarify whether a man with an iffy PSA score needs to get a biopsy, a study finds.

    By Nathan Seppa
  4. Materials Science

    Now, an invisibility cloak you can see

    Physicists have developed a device that can hide objects in visible wavelengths.

    By Devin Powell
  5. Life

    A cougar in Connecticut

    Using DNA and trailside cameras, wildlife biologists retrace the 18-month, 2,000-mile journey of a young male cat.