https://vid.freedif.org/videos/watch/3fca104e-4cd4-4a64-ac50-a975882b5697 Order Take Me to Your Leader here 👇 https://www.simonandschuster.com/books/Take-Me-to-Your-Leader/Neil-deGrasse-Tyson/9781668249970 What’s with math concepts that DON’T describe reality? Neil deGrasse Tyson and Chuck Nice explore all the ways we invented math to describe abstract concepts, and when some of those concepts became real, from negative to imaginary numbers. Plus, what does it mean when an equation has two answers? Timestamps: 00:00 - Equations That Do Not Describe Reality 01:12 - Negative Numbers & Zero 04:27 - Non-Euclidan Geometry 08:10 - Fractions 08:56 - Square Root of a Negative Number 13:20 - Two Answers to One Equation 20:10 - Closing Check out our second channel, @StarTalkPlus Get the lates StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn 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 Sat, 30 May 2026 20:58:07 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://vid.freedif.org https://vid.freedif.org/client/assets/images/icons/icon-1500x1500.png https://vid.freedif.org/videos/watch/3fca104e-4cd4-4a64-ac50-a975882b5697 All rights reserved, unless otherwise specified in the terms specified at https://vid.freedif.org/about and potential licenses granted by each content's rightholder.