The surprising tough and ecological building substance that could reshape our world
BBC World Service
Why Maya Angelou fell out with Billie Holiday over childcare
2/4 Dr Marcus de Sautoy and Blur's Dave Rowntree discuss calculation and maths in music. (R)
BBC Radio 6 Music
William Crawley and guests debate the week's religious and ethical news.
BBC Radio Foyle
BBC Radio Ulster
Chief executives talk about values, dreams and how to lead their companies to success
Pòl MacCaluim 's D R Caimbeul a' tadhail air na bailtean a tha am fasgadh Beinn Èiseabhal. (R)
BBC Radio Nan Gaidheal
3/4 Miranda Sawyer presents Six Degrees of Trepidation.
William Crawley talks to Inspector Lynley author Elizabeth George.
Beth ddigwyddodd i'r gantores o Dalybont yn dilyn ei llwyddiant ar 'Opportunity Knocks'. (R)
BBC Radio Cymru
Janice takes a trip to the movies with Aaron Eckhart and Ashley Jensen. (R)
BBC Radio Scotland except MW
Harlan Coben on his new thriller novel Six Years, plus a report from the London Book Fair.
BBC Radio 4
4/15 A Kist remembers World War II on the 71st anniversary of the Belfast Blitz.
In the last days of the Warsaw Ghetto, the poetry of Wladislaw Szlengel shouted defiance.
Dau dîm o feirdd yn cystadlu i gyrraedd y rownd derfynol yn Eisteddfod Genedlaethol 2013.
Roger Bolton discusses health scares with the BBC's Fergus Walsh.
1/4 1Xtra looks at the life and controversial death of Gang Starr member Guru.
BBC Radio 1Xtra
Francine Stock talks to Jeremy Irons about Trashed, a new documentary about global waste.
Monday 22 April 2013