I apologize if this is in the wrong subsection, but I figured it was a physics learning material. Anyway, I've been reading the Elegant Universe, but found the Nova series quite helpful in understanding what the book is talking about. (I actually read part of the book, got confused, watched the series, and then went back to the book--helped clear a lot up). I've been looking to buy the DVD set, but there are two editions: one from http://www.amazon.ca/Nova-Elegant-U...ef=sr_1_5?ie=UTF8&s=dvd&qid=1250864791&sr=8-5 and one from http://www.amazon.ca/NOVA-Physics-E...ef=sr_1_9?ie=UTF8&s=dvd&qid=1250865139&sr=8-9. I don't know which one is more complete (which has more interviews/extras, etc). I've checked out Amazon, but haven't found any comparison in the DVD details (there's no running time, though it gives a good run-through of the chapters). IMDB gives a running time, and the 2006 one has a lot more, but then on Wikipedia, it describes an interpretive dance (?), and I'm wondering if this is the 2006 edition. Anyway, is there any recommendation? Does the 2006 edition miss anything that the 2004 edition has?