These podcasts are also available on archive.org. This is an educational not-for-profit reproduction.
I love these quick biographies of famous thinkers I believe they deserve more attention. Why not learn from the smartest people in history thinking about the most important questions sharing their thoughts in an hour or so? It's a crime not to do so.
This should work in iTunes. (The link http://danielbmarkham.com/podcast/rss is a podcast feed) If it doesn't work, here's a direct link to the mp3: The life of Aristotle (part 4)