Can we ever reliably predict earthquakes to justify the cost of forecasting them?
BBC World Service
The Royal Welsh Agricultural Show celebrates 50 years at Builth Wells with a big crowd.
BBC Radio 4
Steve Backshall presents the story and sound of the lesser black-backed gull.
Can the oil industry be an asset for wildlife or is the risk too high?
4/4 Michael Blastland asks if finding something disgusting influences moral judgement.
Adam Walton and guests discuss SETI - the search for extra-terrestrial life.
BBC Radio Wales FM only
Academic Ethan Zuckerman on why the internet has failed to connect us across cultures
5/6 Brian Cox and Robin Ince mark the 100th anniversary of the death of Alfred Russel Wallace. (R)
Wednesday 24 July 2013