Stephen Hawking experiencing zero G.
The British theoretical physicist, cosmologist, and author Stephen Hawking experiencing zero gravity with with Zero Gravity Corporation. Image credit: Associated Press.

In keeping with the theme of TED2008, professor Stephen Hawking asks some Big Questions about our universe — How did the universe begin? How did life begin? Are we alone? — and discusses how we might go about answering them.


Stephen Hawking: Questioning the universe
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