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  1. Earth

    Arctic Ocean hosts weird freshwater pond

    Odd, persistent winds prevent river inputs from mixing with the sea.

    By Janet Raloff
  2. Earth

    AGU conference on climate and civilizations

    Ancient trash piles yield Everglades trees, plus 'green' Vikings and more in meeting news.

    By Science News
  3. Earth

    A matter of gravity

    A new map of Earth’s gravitational field is the sharpest ever acquired.

    By Alexandra Witze
  4. Health & Medicine

    Breast milk may harbor cancer clues

    Analysis could provide a noninvasive means for testing risk in women, an early-stage study shows.

    By Nathan Seppa
  5. Humans

    Brain’s mirror system loves the robot

    Experiments that shed light on how the "monkey see, monkey do" part works may suggest why we feel sad for Wall-E.