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The promise of time travel has long been one of the world’s favorite scientific „what-ifs?“ Hawking explores all the possibilities, warping the very fabric of time and space as he goes. From killing your grandfather to riding a black hole, we learn the pitfalls and the prospects for a technology that could quite literally, change everything.
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Copyright © Discovery Communications
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Official Source: http://www.youtube.com/watch?v=Yn4WHIxTa50
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