British physicist Stephen Hawking answers questions during an interview in Orlando, Florida April 25, 2007. Stephen Hawking, whose brilliant mind ranged across time and space though his body was paralyzed by disease, has died, a family spokesman said. REUTERS/Charles W Luzier/File Photo

Stephen Hawking and his new bride Elaine Mason pose for pictures after the blessing of their wedding at St. Barnabus Church September 16, 1995. British theoretical physicist Stephen Hawking has died at the age of 76, the U.K. Press Association reported on Tuesday, citing a spokesman for the family. REUTERS/Russell Boyce/File Photo

Physicist Stephen Hawking sits on stage during an announcement of the Breakthrough Starshot initiative with investor Yuri Milner in New York April 12, 2016. "He was a great scientist and an extraordinary man whose work and legacy will live on for many years," his children Lucy, Robert and Tim said in a statement. REUTERS/Lucas Jackson/File Photo

Physicist Stephen Hawking sits on stage during an announcement of the Breakthrough Starshot initiative with investor Yuri Milner in New York April 12, 2016. The best-known theoretical physicist of his time, Hawking wrote so lucidly of the mysteries of space, time and black holes that his book, "A Brief History of Time," became an international bestseller, making him one of science's biggest celebrities since Albert Einstein. REUTERS/Lucas Jackson/File Photo

Theoretical physicist Stephen Hawking addresses a public meeting in Cape Town May 11, 2008. Even though his body was attacked by amyotrophic lateral sclerosis, or ALS, when Hawking was 21, he stunned doctors by living with the normally fatal illness for more than 50 years. REUTERS/Mike Hutchings/File Photo

Professor of mathematics at Cambridge University Stephen W. Hawking discusses theories on the origin of the universe in a talk in Berkeley, California, March 13, 2007. British theoretical physicist Stephen Hawking has died at the age of 76, the U.K. Press Association reported on Tuesday, citing a spokesman for the family. REUTERS/Kimberly White/File Photo