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Neil deGrasse Tyson: There Is No Speed of Dark

StarTalk Radio 254,287254K
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Published on Sep 20, 2013

What is the speed of dark? And is that even a legitimate question? Watch Neil deGrasse Tyson and Eugene Mirman discuss this Cosmic Query and separate the scientific from the philosophical. If you love StarTalk Radio, don't miss out on any StarTalk news. Sign up for our free newsletter: http://www.startalkradio.net/newslett...

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