News

  1. Neuroscience

    Fentanyl’s death toll is rising

    The ability of fentanyl, an opioid, to freeze chest muscles within minutes may be to blame for some overdoses, a new autopsy study shows.

    By Laura Sanders
  2. Neuroscience

    Eating shuts down nerve cells that counter obesity

    A group of nerve cells shut down when food hits the lips, a study of mice finds.

    By Laura Sanders
  3. Archaeology

    How to get Ötzi’s look

    DNA from Ötzi the Iceman’s clothes and quiver traced to both domesticated and wild animals.

    By Bruce Bower
  4. Earth

    Americas’ hookup not so ancient after all

    Debate lingers over when the Isthmus of Panama formed and closed the seaway that separated North and South America millions of years ago.