News

  1. Physics

    Not-So-Neutral Neutron: Clearer view of neutron reveals charged locales

    A sharp, new picture of the neutron reveals that rather than being uniformly electrically neutral, the particle contains regions of positive and negative charge.

    By Peter Weiss
  2. Materials Science

    Self-Sutures: New material knots up on its own

    Researchers have used a new biodegradable material to make surgical sutures that knot and tighten themselves as they warm to body temperature.

    By Jessica Gorman
  3. Anthropology

    Attack of the Ancestor: Neandertals took a stab at violent assaults

    The pieced-together fragments of a 36,000-year-old Neandertal skull reveal a bony scar caused by a blow from a sharp tool or weapon.

    By Bruce Bower
  4. Health & Medicine

    Deadly Pickup: Enzyme permits plague germ to ride in fleas

    Acquisition of a gene that enables the plague bacterium to live inside blood-sucking fleas may have set the stage for the Black Death.