>> well, we -- we're working with one of the greatest living scientists, one of the best scientific brains in the world. and i'm not a scientist. my job on this series for discovery channel was to bring the views, the vision, the imagination of this great scientist to a mass audience. these are the words of professor hawking. i don't have the scientific credentials to secondguess professor hawking. i'm prepared to believe him because he is such a great scientist. and what we said about aliens in that program was very much what stephen hawking wanted to say. for years he had been lecturing about -- about lots of things, including the possibilities of alien life. what we were able to do for the first time using the wonders of computer graphics was to visualize with professor hawking hypothetically what they might