Dr. Natalie Batalha, a Kepler Mission scientist, is using technology that is out of this world—and out of this solar system—to locate exoplanets, some of which could be Earth-like planets that may be hosts to extraterrestrial life. ➡ Subscribe: http://bit.ly/NatGeoSubscribe ➡ Get More Nat Geo ...

How long will it be before we find alien life on exoplanets? Exoplanet astronomer Dr. Ryan MacDonald explains how biosignatures can be found in exoplanet atmospheres. He also reveals how the discovery of the first close-in planet around a white dwarf could dramatically accelerate the hunt for ...