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  1. Shut up! A thunderstorm’s on the way

    The narrow-leafed gentian, a mountain blossom, is the first flower shown to close when a thunderstorm apporaches.

    By Susan Milius

  2. A bad month for condors

    Two California condors in the wild—a hatching and a just-released juvenile—died the same week, as a third went missing.

    By Janet Raloff
  3. Astronomy

    A comet continues to crumble

    Ever since astronomers first spied a comet 6 months ago and officially dubbed it C/2001 A2, the icy body has been breaking apart.

    By Ron Cowen
  4. Astronomy

    A new giant in the Kuiper belt

    An icy body in the Kuiper belt, a reservoir of comets in the solar system beyond Neptune, is a record setter for the belt and bigger than Pluto's moon Charon.