Astrophysicist Dr. Neil deGrasse Tyson talks about telescopes and how they have changed our understanding of our place in the universe. This is the 400th anniversary of the telescope, and we're going to find out how they were invented. We got a call lined up with one of the shuttle astronauts who's responsible for building the tools that fixed the Hubble. In fact, I think we'll soon get Bill Nye on line. He's an old friend of mine. Well he just has his own coffee every day. That's all it takes. And you know what... Did you know? You know stuff that surprises me every show. ...Mara Yalliata Cott