Academic Earth - University Lectures

Recently, I found a link to an Introduction to Solid State Chemistry course that is OpenCourse. The lecture I listened to was on Diffusion and the professor showed the connection between mass transport by diffusion, Fourier's first Law, and Ohm's Law which Fick, himself, reported on about 150 years ago. Cool.

This is provided at Academic Earth and there are many subjects and many lectures from physics to the bible. Pretty impressive. Have a look.