Mysteries of modern physics: time

Lecture 1. Why time is a mystery

Lecture 2. What is time?

Lecture 3. Keeping time

Lecture 4. Time's arrow

Lecture 5. The second law of thermodynamics

Lecture 6. Reversibility and the laws of physics

Lecture 7. Time reversal in particle physics

Lecture 8. Time in quantum mechanics

Lecture 9. Entropy and counting

Lecture 10. Playing with entropy

Lecture 11. The past hypothesis

Lecture 12. Memory, causality, and action

Lecture 13. Boltzmann brains

Lecture 14. Complexity and life

Lecture 15. The perception of time

Lecture 16. Memory and consciousness

Lecture 17. Time and relativity

Lecture 18. Curved spacetime and black holes

Lecture 19. Time travel

Lecture 20. Black hole entropy

Lecture 21. Eolution of the universe

Lecture 22. The Big Bang

Lecture 23. The multiverse

Lecture 24. Approaches to the arrow of time.