Caspar Henderson: A Book of Noises

<div>My guest in this week's Book Club podcast is Caspar Henderson, whose new book <em>A Book of Noises: Notes on the Auraculous </em>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. </div>