Brian Cox & Neil deGrasse Tyson Explain Lightsabers & More

Could lightsabers work in real life? On this explainer, Neil deGrasse Tyson and comic co-host Chuck Nice sit down with physicist Brian Cox to break down lightsabers, nerd fights, and the eternality of matter itself. Can light bounce off other light? Learn about gamma-gamma scattering and what it means for light to interact with itself. Brian shares a comedy sketch involving Stephan Hawking and his new cosmology show Horizons. Are space and time fundamental or do they come from something deeper? How many civilizations are in a galaxy? What does it mean to live a finite life within an infinite universe? What happens to the stuff that falls into a black hole when it dies? Do black holes destroy information? All that, and we discuss Brian’s upcoming projects! Brian s North American and Global tour dates ⬇️ North American Tour: https://www.briancoxlive.co.uk/northamericantour/ Global Tour: https://www.briancoxlive.co.uk/ Get the NEW Cosmic Queries book (5/5 ⭐s on Amazon!): https://amzn.to/3dYIEQF Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: 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 0:00 - Introduction 0:53 - Brian Cox’s Titles 1:24 - U.K.’s Public Engagement Program 2:19 - Brian’s Rockstar Past 4:32 - Brian’s Credits 4:51 - Neil and Brian’s Nerd Fight 9:30 - Brian’s ‘Horizons’ 14:24 - Hawking Radiation & Eternality Of Matter 16:52 - Closing Notes