If you haven’t found their podcast yet, you must give it a try. Josh Clark and Chuck Bryant have a podcast titled Stuff You Should Know. I am very busy with my teaching and writing, but I always find time to listen to their downloaded podcasts. They are a very entertaining team, part of the “How Stuff Works” site at http://www.howstuffworks.com/. Josh and Chuck have recorded over 250 episodes with topics ranging from serial killers to cliff diving.
Check out this article about them on mediashift: http://www.pbs.org/mediashift/2010/06/how-josh-chuck-made-stuff-you-should-know-a-hit-podcast162.html
You can get the podcast on their site at http://electronics.howstuffworks.com/stuff-you-should-know-podcast.htm or just go to Itunes and look for them there. That is how I found them.