In this March 13, 2007 file photo, Stephen Hawking speaks at Zellerbach Auditorium on the UC Berkeley campusin Berkeley, California. Hawking delivered the annual J. Robert Oppenheimer Lecture in Physics to a sold out crowd.

Professor Stephen Hawking, the former professor of mathematics at the University of Cambridge and author of best-selling “A Brief History of Time,” said Sunday during a summit in China that the human species had…

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