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Stephen William Hawking ( born 8 January 1942) is an English theoretical physicist, cosmologist, author and Director of Research at the Centre for Theoretical Cosmology within the University of Cambridge. His scientific works include a collaboration with Roger Penrose on gravitational singularity theorems in the framework of general relativity, and the theoretical prediction that black holes emit radiation, often called Hawking radiation. Hawking was the first to set forth a theory of cosmology explained by a union of the general theory of relativity and quantum mechanics. He is a vigorous supporter of the many-worlds interpretation of quantum mechanics. Books Written By Him A Brief History Of Time: From Big Bang To Black Holes (http://amzn.to/2f4MxDD) Image Credits: By Doug Wheller [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons https://www.flickr.com/photos/astros/3459678559 By Alexandar Vujadinovic (Own work) [CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons By Doug Wheller [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons