Why understanding the nature of dark matter and dark energy has left scientists baffled
BBC World Service
Adam Walton looks at efforts to counter the threat pests and diseases pose to Welsh trees.
BBC Radio Wales
In the Pinks: Sarah Swadling visits an Isles of Scilly flower farm.
BBC Radio 4
Rachael Garside finds out the environmental benefits of catching a crab.
3/5 The people of Bournemouth recall a day in 1983 when hailstones the size of golf balls fell
BBC Radio 4 Extra
How developments in mapping, travel apps and crowd sourcing are influencing tourism
Steve Backshall presents the story and sound of the corn bunting. (R)
BBC Somerset's weekly look at rural news, countryside issues, wildlife and local events.
Mark Stephen and Euan McIlwraith bring you a taster of the Scottish Game Fair. (R)
BBC Radio Scotland
Why do humans live in cities? And, what are the pros and cons of the modern metropolis?
Two HIV patients show no signs of the virus after bone-marrow transplants.
Ymunwch â Wyn Davies am hanner awr o Wyn ar Wyddoniaeth. (R)
BBC Radio Cymru
Answering questions from everyday chemistry to quantum physics.
BBC Radio Cambridgeshire
Laurie Taylor considers an ethnography of human-bird interactions. Also, Belfast mothers. (R)
Scientists connect cultures of living human neurons to robots to see how the brain works
Monday 8 July 2013