[rimunroe]

The lectures that were put together into the Feynman Lectures on Physics were fabulous. I believe they actually originally thought the audio was lost, but later someone found a bunch of tape reels in storage. The audio is heavily distorted, but a lot of work was done to restore them. I highly recommend anyone with an interest in physics listen to them while reading along in the book. It feels close to actually being in class. He was an exceptionally good teacher.