Kepler 186f

NASA announced yesterday that, using Kepler data, researchers have discovered an exoplanet only ten percent larger than Earth orbiting its red dwarf parent star in that star's habitable zone.  Those researchers believe it to be a rocky world that could have liquid water on its surface, which means it's a possible abode of life.

Kepler 186f is 500 light-years away, and, very likely, the first of many such worlds to be discovered.