Could there be a cheaper, safer way to create nuclear energy? Julian Rush investigates.
BBC Radio 4
Ruth Padel explores how history and literature have shaped our reactions to wild ponies.
BBC Radio 3
Miranda Krestovnikoff finds out where flies go to in winter.
3/6 Clare joins writer and storyteller Anna Maria Murphy on a walk in Cornwall.
Raw sewage regularly pours into the River Thames. Alice Roberts looks for an answer.
8/8 James Aldred visits the Grove of Titans and climbs the world's tallest tree.
Miranda Krestovnikoff searches for the mysterious wading bird, the woodcock.
2/6 Clare joins members of the Wee Binnians, Northern Ireland's biggest walking club.
Deer numbers are rising fast. Tom Heap asks what this means for the rural landscape.
7/8 James Aldred travels to California in search of the world's biggest trees.