[Cosmic Queries] Dark matter, spacetime's expansion, string theory and more with Neil deGrasse Tyson

What is string theory? On this episode, Neil deGrasse Tyson and comic co-host Jordan Klepper answer fan questions about solar system formation, dark matter, and the expansion of spacetime. What would traveling at the speed of light look like? Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: YouTube: https://www.youtube.com/user/startalkradio?sub_confirmation=1 Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/startalk About StarTalk: 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! #StarTalk #NeildeGrasseTyson


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