7/30 Saving Species explores the mysteries of bird migration.
BBC Radio 4
4/5 Reflections on playwright Terence Rattigan, from theatre director Thea Sharrock.
Pink Floyd members explore the tragic mental breakdown of former front man Syd Barrett.
3/5 Memories of playwright Terence Rattigan from director Adrian Brown.
Allan Urry investigates claims that Iran has been stepping up its support for terrorism.
How Aids appeared to come from nowhere 30 years ago
BBC World Service
2/5 Memories of playwright Terence Rattigan, from Oscar-winning writer Ronald Harwood.
1/5 Prof Iain Stewart explores genetic approaches to the treatment and prevention of cancer.
2/6 Stephen Fry joins Brian Cox and Robin Ince to talk about six degrees of separation.
The Vatican's new report on climate change, faith and science, and the Pope's solar panels