It is humankind's most profound achievement: blasting off into the stars. But is it possible that our voyages into the cosmos are really a return to our true origins? And if so, as we venture out further into outer space, will we encounter space trav... (more)elers from other worlds?

Amy Shira Teitel, Bill Birnes, Buzz Aldrin, David Childress, Giorgio A. Tsoukalos, Jerry Linenger, Jim Green, Leroy Chiao, Lewis Dartnell, Mark Carlotto, Michael 'Mike' Bara, Nick Pope, Sergej Spakovskij, Travis Taylor, William Henry