Astrophysicist Neil DeGrasse Tyson reacts to videos of alleged UFOs and explores the possibility of whether humans on Earth are alone in the universe.
ABC News Live Prime, Weekdays at 7EST & 9EST
WATCH the ABC News Live Stream Here: https://www.youtube.com/watch?v=w_Ma8oQLmSM
SUBSCRIBE to ABC NEWS: https://bit.ly/2vZb6yP
Watch More on http://abcnews.go.com/
LIKE ABC News on FACEBOOK https://www.facebook.com/abcnews
FOLLOW ABC News on TWITTER: https://twitter.com/abc
#ABCNLPrime #NeilDeGrasseTyson #Astrophysicist #UFO #Universe #IntelligentLife
source