Dr Thomas Dixon explores Second World War friendships by correspondence and in the forces.
BBC Radio 4
The volunteers who are mapping the world's unmapped places and people
BBC World Service
Chris Mullin investigates what really happens to our rubbish.
2/6 Josie Long presents a sequence of short documentaries about acts of trespass.
The impact of technology and psychology on early 20th-century friendship.
1/2 The Gulf state of Oman grants faiths other than Islam a surprising amount of freedom.
Keith Joseph's impact as the trailblazer for Thatcherism is assessed by James Landale.
Dr Thomas Dixon explores how the international friendship movement flourished after WWI.
1/4 The show must go on - as pub singer Pat Mallon prepares for major surgery. With Alan Dein.
Can science stop sharks attacking humans?