If extraterrestrial life is out there, could it be proven with astronomical records from the past? 👽 | National Geographic TV

Astronomers and researchers are on the hunt for the groundbreaking discovery that confirms extraterrestrial life. Using state-of-the-art technology like the Kepler telescope, scientists have examined thousands of exoplanets in search of another Earth. Is one closer than we think? #SpacesDeepestSecrets | Science Channel