1. National

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.

View all 5 updates ›

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":

More top news