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  1. Health & Medicine

    Gene variant may help against emphysema, asthma

    Uncommon version seems to lessen risk of lung disease in smokers.

    By Nathan Seppa
  2. Earth

    For coots, hatching order is crucial ID

    When birds sneak eggs into others' nest, mom and dad can learn to find their own.

    By Rachel Ehrenberg
  3. Health & Medicine

    Mom and Dad not equally to blame for some bad genes

    Common genetic variants may have different effects on disease depending which parent passes along the trait.

    By Science News
  4. Space

    Super-Earth found close by, may host water

    Astronomers say this discovery and others suggest that finding habitable planets is 'only a matter of time.'