I've only just discovered these great food science public lectures put on by Harvard University available on iTunes. I highly recommend them if you're interested in the hows and whys of food prep, they have great guests such as Harold Mcgee, Joan Roca, and Wylie Dufresne.
I found out about the lecture on the latest cooking issues radio show, and the latest has Dave Arnold (from CI) and Harold Mcgee.
