You can still listen to BBC iPlayer Radio via your browser by visiting bbc.co.uk/radio
Professor Noel Sharkey on the strengths and limititations of robots and AI
BBC World Service Online
Methane could indicate microbial life on Mars - if it is there
Adam Walton meets Professor Julie Williams, Wales's new chief scientific advisor.
BBC Radio Wales
After the horsemeat scandal, Sybil Ruscoe explores a legitimate market for the meat.
BBC Radio 4
Rachael Garside looks at the mixed picture for organic production in Wales.
Brett Westwood presents the story and sound of the great shearwater. (R)
BBC Somerset's weekly look at rural news, countryside issues, wildlife and local events.
Out of Doors asks how changes to work permits will affecting hiring on fruit farms. (R)
BBC Radio Scotland
Sad music has become more popular according to a recent study. Why do people listen to it?
Mars rover Curiosity records no evidence of methane on Mars. Is there no life on Mars?
Answering questions from everyday chemistry to quantum physics.
BBC Radio Cambridgeshire
Laurie Taylor explores the risk-taking experiences of young British tourists in Ibiza. (R)
How deep brain stimulation is treating Parkinson's and depression
Monday 23 September 2013