Hundreds of people were contaminated when a disused radiotherapy machine was scrapped.
Brazil's Nuclear Accident
Melvyn Bragg and guests discuss how we know gas molecules move rather than keep still.
A Ritual Soundscape
David Hendy listens to ancient sounds in Orkney's Ring of Brodgar.
As the Western Mail celebrates its 150th anniversary, Carolyn Hitt explores its history.
Summer BBQ Playlist
Christian Carlisle takes an in depth look at the rich musical heritage of the region.
The Rise of the Shamans
David Hendy explains why sound is central to the shaman's power.