Not sure if there are many NPR listeners out there, but there is an NPR program produced out of Wisconsin called TBOK: "To the best of our knowledge". The program I heard this weekend, was called Caveman. It should interest folks that are into primitive fitness, diets, etc. I only briefly caught Art DeVany (love him or hate him) so I'm going to listen to the whole thing.
Here's a link. Click the Caveman titled segment. You might have to configure your browser to deal with the radio stream. Itunes can handle it.