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  1. Humans

    Jaw breaker

    An ancient human relative that lived more than 1 million years ago possessed huge jaws and teeth suited to eating hard foods but actually preferred fruits and other soft items, a new study finds.

    By Bruce Bower
  2. Health & Medicine

    Friend or foe? Drunk, the brain can’t tell

    Intoxicated brains can’t discern between threatening and safe situations.

    By Tina Hesman Saey
  3. Space

    Supermassive black hole says sayonara

    Researchers have the first observational hint for the existence of an ejected supermassive black hole, fired by a gravitational rocket from the core of the galaxy in which it formed.

    By Ron Cowen
  4. Humans

    Bear deadline

    Court calls for the already overdue decision on listing polar bears as a threatened species.