An illustration of a the surface of a rocky exoplanet orbiting in the habitable zone of a red dwarf star. (NASA/Ames Research Center/Daniel Rutter) We have a new exoplanet to one day scour for potential signs of life. Just 31 light-years away, astronomers have identified an incredibly rare Earth-sized world orbiting at a distance from its star that should be hospitable to life as we know it. If, that is, the exoplanet itself has the right conditions to be conducive to life's emergence. That information isn't available to us yet, but the world represents a promising candidate for a future...