Lectures from the Stanford Linear Accelerator Center including: Whispers of the Big Bang by Sarah Church, Archimedes: Accelerator Reveals Ancient Text by Uwe Bergman, Our Lopsided Universe: The Matter with Anti-Matter by Steve Sekula and The Runaway Universe by Roger Blandford. This collection is yet another great resource.

The number of great resources has prompted me to created a directory of great science and engineering webcast libraries: Curious Cat Science and Engineering Webcast Libraries. These sites have awesome science and engineering videos. Definitely worth viewing.

Related: Google Technology Webcasts – open access science posts – Google Tech Talks – UC-Berkeley Course Videos – The Inner Life of a Cell: Animation