Professor Stephen Hawking smiles during a news conference at the University of Potsdam, near Berlin, Germany, on July 21, 1999. Hawking, whose brilliant mind ranged across time and space though his body was paralyzed by disease, has died, a family spokesman said early Wednesday, March 14, 2018.(AP Photo/Markus Schreiber)
Professor Stephen Hawking smiles during a news conference at the University of Potsdam, near Berlin, Germany, on July 21, 1999. Hawking, whose brilliant mind ranged across time and space though his body was paralyzed by disease, has died, a family spokesman said early Wednesday, March 14, 2018.(AP Photo/Markus Schreiber)Professor Stephen Hawking smiles during a news conference at the University of Potsdam, near Berlin, Germany, on July 21, 1999. Hawking, whose brilliant mind ranged across time and space though his body was paralyzed by disease, has died, a family spokesman said early Wednesday, March 14, 2018.(AP Photo/Markus Schreiber)
