Some past lectures are still available on VHS (on sale for $7.99 each) and audio cassette, and most are now on CD and DVD. All our Caltech lecture DVDs use the NTSC standard on DVD-R discs, using region code 0, playable on computer DVD players worldwide, or on NTSC-compatible DVD players. Choose a topic to browse:
We’ve prepared a PDF, organized by category, so you can read about ALL our audio-video lectures at Caltech. Categories include: top picks, pseudoscience, psychics and magic; environment and global warming, religion, the cosmos, space exploration, extremism, cults, math, stats, satire, songs and more…