News

  1. Plants: Importance of being economic

    The pulse of the real estate market in a given area turns out to be a powerful indicator of how many exotic plant species have invaded the neighborhood.

    By Susan Milius
  2. Astronomy

    A dwarf with a disk

    The Hubble Space Telescope has examined in unprecedented detail a ring of debris around a star that could be the nearest and youngest known home for planets outside the solar system.

    By Ron Cowen
  3. Earth

    Ocean-sensor project reaches milestone

    Oceanographers seeking to deploy an armada of 3,000 robotic probes to take the pulse of Earth's oceans have passed the halfway mark and hope to have the full array of sensors in place by 2007.