This is one of my favorite iTunes U series. What makes this so wonderfully entertaining and well as educational is the demeanor of the host. He is like an old professor who in a matter of fact style, gives an overall course dealing with space, time and the mind. As an avid lover of cosmology it is isn't that I learned much that I didn't already know - it is the spin that the host put on these issues that made me look at these unanswerable questions with a new set of eyes. Thoroughly enjoyed spending time with the professor in his study, or so it seemed to be, kind of like having a conversation with an old friend.