Professor Stephen Hawking attends the New Space Exploration Initiative 'Breakthrough Starshot' Announcement at One World Observatory on April 12, 2016 in New York City. Photo by Dennis Van Tine//UPI

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Professor Stephen Hawking attends the New Space Exploration Initiative 'Breakthrough Starshot' Announcement at One World Observatory on April 12, 2016 in New York City.   Photo by Dennis Van Tine//UPI Stock Photo
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Professor Stephen Hawking attends the New Space Exploration Initiative 'Breakthrough Starshot' Announcement at One World Observatory on April 12, 2016 in New York City. Photo by Dennis Van Tine//UPI
UPI / Alamy Stock Photo
Image ID: TYRAEF