From the July 2000 Scientific American Magazine | 0 comments

Where Are They? ( Preview )

Maybe we are alone in the galaxy after all

By Ian Crawford   

 
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How common are other civilizations in the universe? This question has fascinated humanity for centuries, and although we still have no definitive answer, a number of recent developments have brought it once again to the fore. Chief among these is the confirmation, after a long wait and several false starts, that planets exist outside our solar system.

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