Evidence That Universe Was Twice as Hot 7 Billion Years Ago

Support this channel on Patreon to help me make this a full time job: https://www.patreon.com/whatdamath (Unreleased videos, extra footage, DMs, no ads) Alternatively, PayPal donations can be sent here: http://paypal.me/whatdamath Get a Wonderful Person Tee: https://teespring.com/stores/whatdamath More cool designs are on Amazon: https://amzn.to/3QFIrFX Hello and welcome! My name is Anton and in this video, we will talk about new measurements that prove the universe was hotter back in the days Links: https://www.keio.ac.jp/en/press-releases/files/2025/10/30/251030-1.pdf https://www.cnrs.fr/en/press/cosmic-water-cloud-reveals-temperature-early-universe https://www.nature.com/articles/s41467-025-63216-5 Previous videos: https://www.youtube.com/watch?app=desktop&v=Y2DOCWyyhdI https://www.youtube.com/watch?v=bBO9cjIbwPg https://www.youtube.com/watch?v=ckbjNIv0gmM https://www.youtube.com/watch?v=21-268I43W0 https://www.youtube.com/watch?v=9ncjebD_Bpc #universe #bigbang #cosmicmicrowavebackground 0:00 Temperature of the universe in the past 1:00 Temperature today compared to before 2:05 How to prove this? CMB - cosmic microwave background 3:30 Predictions of what we should see 4:30 Using quasars to measure this 6:50 Previous attempts to measure this 7:15 New precise measurements and what this means 9:10 Previous studies from even farther away 10:30 Implications and why this matters 12:10 Conclusions and what's next? Enjoy and please subscribe Bitcoin/Ethereum to spare? Donate them here to help this channel grow! bc1qnkl3nk0zt7w0xzrgur9pnkcduj7a3xxllcn7d4 or ETH: 0x60f088B10b03115405d313f964BeA93eF0Bd3DbF Thank you to all Patreon supporters of this channel Special thanks also goes to all the wonderful supporters of the channel through YouTube Memberships Credit: IRAM/MPIA/ESA/Planck Collaboration/Dominik Riechers/Martina Markus/Universität Zu Köln P. Noterdaeme et al., Astronomy & Astrophysics, 2011 Onsala Space Observatory/R. Cumming/S. Muller Licenses used: https://creativecommons.org/licenses/by/4.0/ and relevant Creative Commons licenses