Here's a blast from the somewhat-recent past: a set of five lectures I gave at CERN in 2005. It looks like the quality of the recording is pretty good. The first lecture was an overview at a colloquium level; i.e. meant for physicists, but not necessarily with any knowledge of cosmology. The next four are blackboard talks with a greater focus; they try to bring people up to speed on the basic tools you need to think about modern early-universe cosmology. Obviously I'm not going to watch all five hours of these, so I'll just have to hope that I'm relatively coherent throughout. (I do remember being a bit jet-lagged.) But I do notice that, while it was only a few years ago, I do appear relatively young and enthusiastic. Ah, the ravages of Time... Lecture One: Introduction to Cosmology [embed]http://www.youtube.com/watch?v=vUNtO2r_-eo[/embed] Lecture Two: Dark Matter [embed]http://www.youtube.com/watch?v=Gq-lGX2PRrc[/embed] Lecture Three: Dark Energy [embed]http://www.youtube.com/watch?v=cYVj2RhXxeU[/embed] Lecture Four: Thermodynamics and the Early Universe [embed]http://www.youtube.com/watch?v=178mMnGvWs0[/embed] Lecture Five: Inflation and Beyond [embed]http://www.youtube.com/watch?v=M1PeXaMqKto[/embed]