Do intelligent aliens exist? Who knows? But here's what we do know: the potential existence of intelligent aliens probes meaning and purpose in the universe. What would it mean if the universe were teeming with life? What would it mean if we humans were alone? Free access to Closer to Truth's library of 5,000 videos: http://bit.ly/376lkKN Watch more interviews on intelligent alien life: https://bit.ly/2GwgWND Steven J. Dick is an American astronomer, author and historian of science most noted for his work in the field of astrobiology. Dick served as the Chief Historian for the National Aeronautics and Space Administration from 2003 to 2009. Register for free at CTT.com for subscriber-only exclusives: http://bit.ly/2GXmFsP Closer to Truth, hosted by Robert Lawrence Kuhn and directed by Peter Getzels, presents the world’s greatest thinkers exploring humanity’s deepest questions. Discover fundamental issues of existence. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers.