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  1. Humans

    Hard throwers evolved a long time ago

    Baseball hurlers provide clues to the ancient roots of bodies that can heave objects really fast.

    By Bruce Bower
  2. Animals

    Elephant diets changed millions of years before their teeth

    The animals fed on grasses long before their molars could grind the tough plants.

    By Erin Wayman
  3. Astronomy

    Cradled galaxies betray violent past

    Hubble snaps ‘the Penguin’ and its egg-shaped companion.

    By Jessica Shugart
  4. Health & Medicine

    Paralyzed rats relearn to pee

    Bladder control restored for the first time in animals with stark spinal cord damage.

    By Meghan Rosen
  5. Chemistry

    High methane in drinking water near fracking sites

    Well construction and geology may both play a role in pollution.