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Stephen William Hawking CH CBE FRS FRSA (8 January 1942 14 March 2018) was an English theoretical physicist, cosmologist, author, and Director of Research at the Centre for Theoretical Cosmology within the University of Cambridge. His scientific works included a collaboration with Roger Penrose on gravitational singularity theorems in the framewor ... ... ( read more! ) ... ... ... ... ... ... ... ... ... ... ... ... ... Kip Stephen Thorne is an American theoretical physicist known for his contributions in gravitational physics and astrophysics. ... ... ( read more! )