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Theory of Time Travel

New Scientist’s fledgling Explanimator series on YouTube has tackled that favorite sci-fi staple, time travel. As the narrator says, the laws of physics don’t explicitly forbid time travel, but it won't be easy. Click through to watch the episode. http://gizmodo.com/we-already-know-how-to-build-a-time-machine-in-theory-1742892644 #tech

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