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NEW YORK, NEW YORK - APRIL 12: Stephen Hawking, CH, CBE, FRS, Dennis Stanton Avery and Sally Tsui Wong-Avery Director of Research, University of Cambridge as he and Yuri Milner host press conference to announce Breakthrough Starshot, a new space exploration initiative, at One World Observatory on April 12, 2016 in New York City. (Photo by Bryan Bedder/Getty Images for Breakthrough Prize Foundation)

The renowned British scientist Stephen Hawking died in 2018, but he’s still talking to us. His parting words to humanity have just been released, in the form of recorded excerpts from his last book, Brief Answers to Big Questions. Here’s what he has to say.

First, we have to stop ignoring climate change or we will be doomed, said Hawking. “A rise in ocean temperature would melt the ice caps and cause the release of large amounts of carbon dioxide,” Hawking said. “Both effects could make our climate like that of Venus with a temperature of 250C.”

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