Television series in which Professor Hawking examines just how far our understanding of the universe has developed in our own lifetimes. Having mesmerized some and confuddled others with his science best-seller 'A Brief History of Time', the professor looks at how much more we have learned about our universe in the 20 years since the book's publication. Able to introduce fresh ideas which even he dared not imagine two decades ago, Hawking drives this series with his continued fascination with the big questions. How did the universe begin? How will it end? What was there before it?