What if everything we know about the universe is only a fraction of the story? From objects so massive they defy imagination, to traveling back before the Big Bang, the universe shrinking around us, and the collision of galaxies that could reshape our night sky. But what if we could actually see a fourth dimension or fall into the largest void in existence? We’re exploring the most mind-bending possibilities the cosmos has to offer. Enjoying this video? Dive even deeper into the world of science and discovery with Popular Science, the free streaming channel bringing you more of what you love from What If, plus epic explorations in engineering, rocket launches, movies, space, and Earth sciences https://underknown.com/popularscience/ 00:05 - The True Scale of the Largest Objects in the Universe 22:28 - What If You Traveled to Before the Big Bang? 43:55 - What If The Universe Starts Shrinking? 1:04:54 - What if you lived through Milkdromeda? 1:28:02 - What If you Could See the 4th Dimension? 1:55:30 - What If You Fell Into the Biggest Void in the Universe? Support us on Patreon: https://www.patreon.com/whatifshow/membership Check out our other channels: How to Survive: https://bit.ly/how-to-survive-show Animalogic: https://www.youtube.com/@UCwg6_F2hDHYrqbNSGjmar4w Aperture: https://bit.ly/aperture-show T-shirts and merch: http://bit.ly/whatifstore What If elsewhere: Instagram: http://bit.ly/whatif-instagram Discord: https://discord.gg/Bj5UnspbwE Podcast: http://bit.ly/yt-what-if-show-podcast What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way. Contact us at https://underknown.com/contact/ NUGABYMSNFFFZU7D #whatif #science #earth #universe #cosmos