People join world leaders for Nelson Mandela's memorial service in Johannesburg
BBC World Service
What is the effect of increasing numbers of tourists visiting wildlife hotspots?
BBC Radio 4
1/4 Tarek Osman traces the characters and ideas that have shaped the modern Arab world.
Felicity Evans covers the debate over the proposed M4 relief road to the south of Newport.
BBC Radio Wales
Bob Harris looks at the fourth series of The Old Grey Whistle Test.
BBC Radio 6 Music
The new materials that can self-mend, from concrete cracks to car paint scratches
1/4 Mark Lamarr traces Perry's formative years.
Sea lions in California are developing cancer from ocean pollution. What can be done?
2/3 Giles Fraser asks if we have always been nostalgic about community.
Bryan Ferry returns to his early passion for jazz music.