1/5 Exploring the impact that Mendelssohn's Octet has had on different people's lives.
BBC Radio 4
1/2 Is human culture stopping us from genetically evolving?
Peter Hennessy, the leading Whitehall watcher, looks at government secrecy.
Filthy and embarrassing, the Ganges needs help - we explore how the Thames can save it
BBC World Service
Lyse Doucet asks diplomats and politicians how we should engage with brutal regimes.
Assignment investigates killings and torture in Zimbabwe's diamond fields
New insights into why we age and how we might live more healthily for longer
Can a young Canadian man with Down's Syndrome get a university degree?
The Muslim brotherhood that preaches hard work as the way into paradise
Gordon Corera tells the story of the search for the world's most wanted terrorist