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The Ancient Ark (9.30 am R4). The eagle in cultural mythology (repeat series).
Solitude (11.00 am R4). Second half of Peter France's examination of being alone concentrates on enforced solitude - from an anti-apartheid prisoner to an old lady in her own home.
Afternoon Play: Hanging from the Sky (2.15 R4). Documentary drama about Stonehenge, apparently using the latest archaeological knowledge.
A Short History of Darkness (3.45 R4). The second collage (of three) is about the darkness of the Antarctic night, under the sea, etc. With new poems by Sarah Maguire and John Burnside.
Case Notes (9.00 R4). About NICE (National Institute for Clinical Excellence), the new government agency, and what its effect might be. ? Everyman: Angels (10.35 BBC1; 11.05 in N. Ireland, Scotland, 11.15 in Wales). Birmingham University researcher Emma Heathcote explores people's "angel experiences".
Faces of Islam (11.25 BBC1; 11.55 in N. Ireland, Scotland, 12.05 am in Wales). Turkish flautist Kudsi Erguner on his faith and his music.