Caspar Henderson: A Book of Noises

My guest in this week's Book Club podcast is Caspar Henderson, whose new book A Book of Noises: Notes on the Auraculous really is a journey into sound. He tells me why the music of the spheres – at least in this solar system – is a terrible racket, what we can learn from whale earwax, and why bat-squeaks are, in fact, very very loud indeed.