Scientists have discovered how a type of worm appears to be able to 'live forever'
BBC World Service
Grow our own - the need for more UK fruit and veg growers. Presented by Anna Hill.
BBC Radio 4
The race between pet collectors and conservationists when a new species is discovered.
Ruth Padel on our feelings towards the snake through biology, history and literature.
BBC Radio 3
Saturday 3 March 2012