Why Energy Is Not Conserved in General Relativity
Veritasium · Explainer · 28 min · 2025 · YouTube title: The Biggest Misconception in Physics
Why it's here
Recommended as high-quality physics communication and as an introduction to Noether and energy non-conservation in cosmology.
What it covers
Veritasium explores why energy is not conserved in general relativity, using Emmy Noether's theorem linking symmetries to conservation laws. Physicists interviewed explain energy loss in an expanding universe.