File - British physicist Stephen Hawking attends the 2010 World Science Festival opening night gala performance at Alice Tully Hall on Wednesday, June 2, 2010 in New York.  Physicist Stephen Hawking says God wasn't necessary for the creation of the universe. In his new book, "The Grand Design," the British scientist says unraveling a complex series of theories will explain the universe. The book, written with American physicist and author Leonard Mlodinow, will be published Sept. 9 2010. (AP Photo / Evan Agostini)

Photo by: Evan Agostini

File - British physicist Stephen Hawking attends the 2010 World Science Festival opening night gala performance at Alice Tully Hall on Wednesday, June 2, 2010 in New York. Physicist Stephen Hawking says God wasn't necessary for the creation of the universe. In his new book, "The Grand Design," the British scientist says unraveling a complex series of theories will explain the universe. The book, written with American physicist and author Leonard Mlodinow, will be published Sept. 9 2010. (AP Photo / Evan Agostini)