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.



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.



http://youtu.be/xjBIsp8mS-c