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Black Holes | National Geographic

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Uploaded on Sep 8, 2008

Stephen Hawking's theory of black holes and Richard Gott's theory of cosmic strings give hope to those seeking a route to time travel.
Naked Science: Time Machine: http://channel.nationalgeographic.com...
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Black Holes | National Geographic
https://youtu.be/EOi0xA9GvX8

National Geographic
https://www.youtube.com/natgeo

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