About one-third of sun-like stars are predicted to have at least one terrestrial planet in a habitable zone, says California Institute of Technology astronomer Wesley Traub after studying data from the Kepler orbiting observatory. (Thanks, Ariel Waldman!)

(Also, as Rob previously pointed out, astronomers recently found more than 50 new exoplanets including 16 super-Earths, one of which is near its star’s habitable zone!)

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(Lots of) Earth-like planets are very likely