News

  1. Tech

    Litmus test gets tiny

    When zapped by a laser, new, light-sensitive nanobaubles could provide a reading of pH, or how acidic or basic a solution is, even from deep inside living cells.

    By Peter Weiss
  2. Health & Medicine

    Obesity correlates with psychiatric disorders

    Obese adults are 25 percent more likely than normal-weight adults to develop one of four mood or anxiety disorders.

    By Eric Jaffe
  3. Paleontology

    Rarity of fossils of young tyrannosaurs explained

    Paleontologists have unearthed only a few juvenile tyrannosaurs, and a new study suggests why: A large percentage of these meat-eating dinosaurs, unlike many other creatures, survived into adulthood.

    By Sid Perkins
  4. Health & Medicine

    Device spots sponges left behind

    A device that uses radiofrequency identification can detect tagged sponges left in patients undergoing surgery.