Stephen Hawking answers our questions on the #BreakthroughStarshot initiative https://t.co/A38JrDVdfo http://pic.twitter.com/lirWZi4mzl
— Popular Science (@PopSci) April 14, 2016
via Twitter https://twitter.com/PopSci
April 14, 2016 at 05:43PM
Stephen Hawking answers our questions on the #BreakthroughStarshot initiative https://t.co/A38JrDVdfo http://pic.twitter.com/lirWZi4mzl
— Popular Science (@PopSci) April 14, 2016
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