Dark Matter, Spacetime's Expansion, & String Theory with Neil deGrasse Tyson - Cosmic Queries

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What is string theory? What would traveling at the speed of light look like? Neil deGrasse Tyson and comic co-host Jordan Klepper answer fan questions about solar system formation, dark matter, and the expansion of spacetime.

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Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!

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Space
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