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Stephen Hawking

Stephen Hawking
FILE - In this Thursday, April 26, 2007 file photo physicist Stephen Hawking answers questions during an interview in Orlando, Fla. Famed mathematician Stephen Hawking has been rushed to a hospital and is seriously ill, Cambridge University said Monday April 20, 2009 .British scientist Stephen Hawking has decoded some of the most puzzling mysteries of the universe but he has left one mystery for others to explain: How he managed to survive so long with such a crippling disease. The physicist and cosmologist was diagnosed with Lou Gehrig's disease, or motor neuron disease, when he was a 21-year-old student at Cambridge University. Most people die within a few years of the disease being identified. On Sunday, Hawking will turn 70. (AP Photo/John Raoux. File )