The Wall of the Universe Explained — Narrated by David Attenborough

The Wall of the Universe Explained — Narrated by David Attenborough | Science Documentary 2025 ► Subscribe Now: @asdtheexplainer What lies at the farthest edge of everything we can see? A boundary not built of stone or metal, but of light, time, and the very limits of cosmic history. In this film, narrated in the iconic voice and style of Sir David Attenborough, we explore what many scientists call the wall of the universe — the outermost horizon beyond which no information can ever reach us. We journey across billions of light-years to the edge of the observable cosmos, where ancient light from the dawn of time still travels toward us. We uncover why this “wall” is not a physical barrier, but a limit carved by the speed of light, the expansion of space, and the birth of time itself. What exists beyond it? More galaxies? New physics? Or a reality forever hidden from view? From inflationary theory to cosmic horizons, from the cosmic microwave background to the mysterious regions beyond observation, we confront one of the greatest mysteries in cosmology: does the universe truly end… or does our vision simply fade before the truth appears? Join us as we journey to the farthest frontier — the place where the known universe ends, and the unknown begins. 🎵 Music credits: Lost Frontier by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 license. https://creativecommons.org/licenses/... Source: http://incompetech.com/music/royalty-... Artist: http://incompetech.com/ 💼 Let’s work together: For business inquiries, copyright concerns, or collaborations, feel free to reach out at [email protected].