British physicist, Professor Stephen Hawking speaks during the Opening Ceremony for the 2012 Paralympics in London, Wednesday Aug. 29, 2012. (AP Photo/Matt Dunham)

 

              British physicist, Professor Stephen Hawking speaks during the Opening Ceremony for the 2012 Paralympics in London, Wednesday Aug. 29, 2012.  (AP Photo/Matt Dunham)
British physicist, Professor Stephen Hawking speaks during the Opening Ceremony for the 2012 Paralympics in London, Wednesday Aug. 29, 2012. (AP Photo/Matt Dunham)
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