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  1. Plants

    Biggest Bloom: Superflower changes branch on family tree

    The plants with the world's largest flowers, the rafflesias, need to be moved closer to poinsettias on the family tree of plant life.

    By Susan Milius
  2. Health & Medicine

    No Fluke: New weapon against tropical parasite

    An experimental drug shows potential against schistosomiasis.

    By Nathan Seppa
  3. Ecosystems

    Alien Alert: Shrimpy invader raises big concerns

    A shrimplike European invader just discovered in the Great Lakes could prove ecologically disruptive to populations of native lake animals.

    By Janet Raloff
  4. Astronomy

    Fleet Finding: Speed of Milky Way’s companions poses puzzle

    New measurements of the speed of two familiar companion galaxies to the Milky Way suggest some unfamiliar possibilities.