Catalog · Einstein, Oppenheimer, Feynman: Physics in the 20th Century Lecture 23 of 25 Lecture 23: The Birth of Particle Cosmology ← Previous Lecture 22: Quarks, QCD, and the Rise of the Standard Model Next → Lecture 24: The Big Bang, Cosmic Inflation, and the Latest Observations ✓ Mark complete Materials Transcript (PDF) ↗ transcript