Today, rather than our usual Wednesday TED Talk, two videos from the Khan Academy, a collection of educators, artists, and professionals from a variety of disciplines that construct and post videos for free for anyone who wants to watch and learn. I’ll post more on the Kahn Academy next week, but for now I want briefly to introduce these two videos as we continue our commemoration of the Reformation. The first video one sets the context for the Reformation, introducing us to Luther’s world and to Luther. The second one delves into the Reformation itself, particularly as it centered around Luther, explaining the historical context and...