on earth :

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on earth


  • r  used with question words to convey surprise
News & Articles

  • New Clues Into Mystery of Mars Meteorites & Rocks Revealed
    Scientists are a step closer to reconciling a mystery on Mars, a cosmic oddity centered on Martian rocks and pieces of the Red Planet discovered on Earth.
    June 19, 2013 - SPACE.com via Yahoo! News
  • NASA wants backyard astronomers to help track asteroids
    By Deborah Zabarenko WASHINGTON (Reuters) - NASA called on backyard astronomers and other citizen-scientists on Tuesday to help track asteroids that could create havoc on Earth. The U.S. space agency has already identified 95 percent of the potentially planet-killing NEOs - near Earth objects - with a diameter of .62 miles or more, a size comparable to the space rock many scientists believe ...
    June 18, 2013 - Reuters via Yahoo! News

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