For 45 minutes a day, I'd recommend the BBC In Our Time podcast, hosted by Melvyn Bragg. Each week, academics talk about a particular topic from the world of sc

For 45 minutes a day, I'd recommend the BBC In Our Time podcast, hosted by Melvyn Bragg. Each week, academics talk about a particular topic from the world of science, history, philosophy etc. It's unashamedly high-brow. There's a huge back catalogue as well.