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? 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 underknown.com/popularscience 00:05 The True Scale of the Largest Objects in the Universe 22:28 Before the Big Bang 43:55 The Universe Starts Shrinking 1:04:54 Milkdromeda 1:28:02 The 4th Dimension 1:55:30 The Biggest Void in the Universe Support us on Patreon: patreon.com/whatifshow/membership Check out our other channels: How to Survive: https...