News

  1. Archaeology

    Earliest known stone tools unearthed in Kenya

    East African discoveries suggest stone-tool making started at least 3.3 million years ago.

    By Bruce Bower
  2. Astronomy

    Peeks into early life of supernovas show how to blow up a star

    Multiple supernovas show off some of the ways a star can explode.

    By Christopher Crockett
  3. Health & Medicine

    Snagging blood clots upgrades stroke care

    A new device threaded up to the brain via catheter can unblock vessels in cerebral arteries, studies show.

    By Nathan Seppa
  4. Planetary Science

    Sea salt may stripe Europa’s surface

    Salt deposits on Jupiter’s moon Europa might be responsible for brown stripes on the icy satellite’s surface.