Feynman's Messenger Lectures on the "Character of Physical Law" at Cornell University (1964) - Complete Series - Abridged - Better Audio
Lecture 1
0:00 The Law of Gravitation - An Example of Physical Law
Lecture 2
48:00 The Relation of Mathematics and Physics
Lecture 3
1:40:32 The Great Conservation Principles
Lecture 4
2:33:38 Symmetry in Physical Law
Lecture 5
3:27:45 The Distinction of Past and Future
Lecture 6
4:10:46 Probability and Uncertainty - The Quantum Mechanical View of Nature
Lecture 7
5:04:25 Seeking New Laws