Sep 13, 2016 05:20 AM EDT
NASA Astronaut Says Aliens Exist: It's ‘Arrogant’ To Think We're Alone In The Universe
Ex NASA Astronaut Dr. Leroy Chiao believes the discovery of exoplanets orbiting within their parent stars' habitable zone is helping humanity's search for extraterrestrial life. But will we ever meet our galactic neighbors, if there are any?
