I listen to the bbc's 'in our time' programmes [0] whilst driving. They are (much) more general than you want, but they are excellent programmes covering the w

I listen to the bbc's 'in our time' programmes [0] whilst driving. They are (much) more general than you want, but they are excellent programmes covering the whole spectrum of human knowledge. I've become a more broadly educated person by listening to those podcasts. [0] http://www.bbc.co.uk/programmes/b006qykl http://www.bbc.co.uk/programmes/b006qykl