Why does energy disappear in General Relativity? 0:00 What is symmetry? 4:25 Emmy Noether and Einstein 7:33 General Covariance 11:59 The Principle of Least Action 15:29 Noether's First Theorem 18:24 The Continuity Equation 23:20 Escape from Germany 24:49 The Standard Model - Higgs and Quarks The Hole In Relativity Einstein Didn't Predict | 27:39 Veritasium | 18.4M subscribers | 8,522,299 views | April 14, 2025 Emmy Noether [YouTube search]