In the Solar System's outer darkness, planet Neptune has its first 'official' birthday.
BBC World Service
2/3 Cecil Balmond examines the hidden geometry at the core of the Taj Mahal
An Iranian visits America to see how Muslims there live 10 years after 9/11.
Kat Arney investigates why little girls are addicted to the colour pink, and if it matters
BBC Radio 4
5/5 Lucy Ash meets young Polish Catholics who have turned their backs on the material world.
5/5 Jane Garvey returns to Liverpool, 25 years on.
15/30 Saving Species reports from the Wailing Wall in Jerusalem on the conservation of swifts.
4/5 Lucy Ash meets Europe's disaffected youth.
4/5 Richard Coles returns to Finedon 25 years on.
1/2 What can happen in your early years to boost or block your chances later on?