NASA's tribute to Stephen Hawking will make you smile like he did in microgravity

NASA paid tribute to cosmologist Stephen Hawking following his death early Wednesday morning.

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NASA shared a video on Twitter that Stephen Hawking recorded for astronauts Rick Mastracchio and Koichi Wakata on the International Space Station in 2014.

Remembering Stephen Hawking, a renowned physicist and ambassador of science. His theories unlocked a universe of possibilities that we & the world are exploring. May you keep flying like superman in microgravity, as you said to astronauts on @Space_Station in 2014 pic.twitter.com/FeR4fd2zZ5

— NASA (@NASA) March 14, 2018 Read more...

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