Alien Planet Earths

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Alien Planet Earths
Discovery Science  |  November 17, 2016

Thanks to NASA's ground-breaking Kepler mission, astronomers believe there are over 20 billion alien worlds with liquid water and therefore the potential for life.

Thanks to NASA's ground-breaking Kepler mission, astronomers believe there are over 20 billion alien worlds with liquid water and therefore the potential for life.

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