As Caryl Churchill's Light Shining in Buckinghamshire is revived at The National's Lyttelton Theatre, Anne McElvoy hears how it resonates with current historical research with historians Justin Champion and Emma Wilkins. Anne also visits the British Museum's exhibition Indigenous Australia: Enduring Culture in the company of curator Gaye Sculthorpe, and hears from australian aboriginal scholar Christine Nicholls. And then joined in the studio by anthropologist Howard Morphy to discuss the difficulty of translating the concept of Dreamtime into english and the role its related art has played in shaping views of aboriginal history and contemporary frustrations.