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Sara Seager on Exoplanets


Scientists are combing the universe for signs of exoplanets -- planets that orbit a star other than our sun.  They're finding them in record numbers.  Most believe it's only a matter of time before they find an exoplanet that can -- and perhaps does -- suppport life.  Sara Seager is a planetary scientist at M.I.T. and one of the pioneers of the field.