A talk show about ideas and culture, produced and presented by Neil Denny. Each show features guests from the worlds of science or the arts in conversation. This week: Astrophysicist Sara Seager on her memoir, The Smallest Lights in The Universe. Visit littleatoms.com for more information. Tweet to @littleatoms. Contact littleatomspodcast@gmail.com. [Repeated Saturday 9am.]

Journey around the world with travel hungry record collector Jamal and experience ethereal music spanning cosmic soul, global funk and spiritual jazz. You'll explore far off and far out places all from the comfort of your own sanctuary. This week: the journey along the Pan-American Highway brings us to the land of volcanoes, Guatemala. There'll be plenty of psychedelic music to explore. Find Jamal on Mixcloud, Instagram and Facebook. [Repeats Wednesday 1pm.]

Sound-art and transmission-art delivered monthly by London sound art collective Gwaith Sŵn. This month: we consider different approaches to field recording, in particular looking at those interested in located sound (place) and those making use of field recordings as sonic material (plasticity). Featuring field recordings in various degrees of transformation from Indian cremation rituals, Scottish nature walks, London's relentless construction noise, Zimbabwean mbira jams and Brazilian cacti turned percussion instruments, and we talk to composer and researcher Andrew Knight-Hill about field recording and spatial identity. [Repeated Sunday 6am.]