Prehistoric stone circles: everything you want to know

If you've ever visited one of the many prehistoric stone circles that dot the landscape of Britain and Ireland, you've probably come away with lots of questions. How were they built? When were they built? Why were they built? And what on earth were they for? In this 'everything you want to know' episode, we've got the answers –or at least some of them – for you, as Professor Vicki Cummings delves into the history of prehistoric stone circles with David Musgrove.