AdvertisementIn Search For Habitable Planets, Why Stop At 'Earth-Like'?January 16, 2014Nell GreenfieldboycefacebookEmailKepler-22b, seen in this artist's rendering, is a planet a bit larger than Earth that orbits in the habitable zone of its star. Some researchers think there might be "superhabitable" worlds that may not resemble Earth. (NASA/Ames/JPL-Caltech)
