LONDON, ENGLAND - JULY 20:  Theoretical Physicist Stephen Hawking attends a press conference on the Breakthrough Life in the Universe Initiatives, hosted by Yuri Milner and Stephen Hawking, at The Royal Society on July 20, 2015 in London, England.  (Photo by Stuart C. Wilson/Getty Images for Breakthrough Initiatives) Photo: Stuart C. Wilson, Stringer / (Credit Too Long, See Caption) / 2015 Getty Images