Best of Stephen Hawking

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Astronomer Royal Martin Rees gives a lecture 'From Planets to... News PhotoAstronomer,Birthday,Cambridge - England,Cambridge University,Cambridgeshire,Conference - Event,Giving,Horizontal,Science and Technology,Stephen Hawking,UKPhotographer Collection: AFP 2012 AFPAstronomer Royal Martin Rees gives a lecture 'From Planets to Universes' at Stephen Hawking’s 70th birthday symposium lecture at The University of Cambridge on January 8, 2012. British scientist Stephen Hawking was forced to miss a scientific debate to mark his 70th birthday Sunday because he was only discharged from hospital two days earlier. AFP PHOTO / JUSTIN TALLIS (Photo credit should read JUSTIN TALLIS/AFP/Getty Images)