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Neil deGrasse Tyson’s Guide To Time Travel — StarTalk 101

How would time travel work? Journey back through some of StarTalk’s favorite time travel moments from the past, covering topics like The Grandfather Paradox, wormholes, and tachyons. Featuring Brian Greene, Joseph Gordon Levitt, Colin Jost, and more! What would time travel look like to an outside observer? Learn about how time travel through wormholes would work, The Grandfather Paradox, and whether the timeline cares about major events versus minor events. Is time travel to the past even theoretically possible? We break down ways we are already time traveling through time dilation. What would it be like to look at time from a higher dimension? Come check out our brand-new channel!    / @startalkplus   Get the NEW StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn Support us on Patreon:   / startalkradio   FOLLOW or SUBSCRIBE to StarTalk: Twitter:   / startalkradio   Facebook:   / startalk   Instagram:   / 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 Timestamps: 00:00 - What Would Time Travel Look Like to an Observer? 3:36 TIme Travelling Via Wormhole 5:18 - The Grandfather Paradox 12:16 - Time Travel in Looper 17:00 - Causal Loop Paradoxes 19:49 - If There Are No Time Travelers Now, Could There Be in The Future? 22:44 - Time Travel in Interstellar