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Stephen Hawking with NASA Administrator Charles Bolden
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Photo: Stephen Hawking and daughter Lucy speak at NASA lecture series in Washington - WAP20080421309 - UPI.com
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NASA Honors Legacy of Renowned Astrophysicist Stephen Hawking - YouTube
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Stephen Hawking - Wikipedia
Stephen Hawking NASA 50th (200804210010HQ) | Dr. Stephen Haw… | Flickr
Stephen Hawking and the Billionaires
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Stephen Hawking Receives Copley Medal - NASA
Hawking goes zero-G: 'Space, here I come'
Stephen Hawking NASA 50th (200804210005HQ) | Dr. Stephen Haw… | Flickr
Stephen Hawking NASA 50th. NASA public domain image colelction. - PICRYL - Public Domain Media Search Engine Public Domain Search
Stephen Hawking | Facts, Biography, Books, & Theories | Britannica
NASA's tribute to Stephen Hawking will make you smile like he did in microgravity | Mashable
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Stephen Hawking 1942-2018
Physicist Stephen Hawking, seen in this April 21, 2008 file photo, delivers a lecture entitled "Why We Go into Space" as a part of a lecture series honoring NASA's 50th Anniversary, at
