OSIRIS-Rex scientist Lindsay Keller says ancient rocks and soil from the asteroid Bennu could revolutionize what we know about space. WATCH the ABC News Live Stream Here: youtube.com/watch?v=w_Ma8oQLmSM SUBSCRIBE to ABC NEWS: bit.ly/2vZb6yP Watch More on abcnews.go.com LIKE ABC News on FACEBOOK facebook.com/abcnews FOLLOW ABC News on TWITTER: twitter.com/abc #nasa #osirisrex #bennu #abcnl #abcnews