News

  1. Life

    Ancestors of today’s placental mammals may never have shared the Earth with dinosaurs

    A newly constructed family tree dovetails with the fossil record, but differs considerably from previous genetic studies by suggesting that placental mammals emerged after the dinosaur extinction.

    By Erin Wayman
  2. Animals

    Compared with rodents, bat species carry more viruses

    Viruses that can jump from animals to people may find the flying mammals a fine place to lurk.

    By Susan Milius
  3. Life

    Inflammation feeds E. coli

    Inflammation, normally a defense against microbes, may become counterproductive in the gut by feeding disease-causing bacteria.

    By Tina Hesman Saey
  4. Archaeology

    A king’s final hours, told by his mortal remains

    The skeleton of Richard III reveals a violent and chaotic end for a controversial English monarch.