NASA findings show there are 'many habitable planets'

NASA scientist Tom Barclay says new discoveries by the Kepler satellite mean habitable planets are no longer just "theoretical":

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T. Barclay: These discoveries suggest that there are many habitable, small planets.

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T. Barclay: Discussing habitable planets is no longer a theoretical exercise.

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New planets 'could host life'

NASA says three new planets that could host life have been discovered. The "super Earth-sized" worlds were found in the habitable zone outside the solar system by NASA's Kepler satellite.