RIP: Professor Stephen Hawking (1942-2017)

In this file photo taken on April 26, 2007 and released by Zero G, British cosmologist Stephen Hawking experiences zero gravity during a flight over the Atlantic Ocean

In 2007 Hawking became the first quadriplegic to experience weightlessness on board a plane specially designed to simulate zero gravity. “I think the human race has no future if it doesn’t go into space,” he said.

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