Professor H. L. Bray        
                Video Series
                        What is Democracy?
                        Balancing Risk and Reward
                        Special Relativity
                        General Relativity     
                        Introduction to Differential Geometry (Math 421 at Duke University)     - coming soon

Special Thanks to Devon Henry and Stephen Toback of Duke University's Academic Media Services in the Office of Information Technology for helping me create the video series listed above.