Author: BBC Radio 4

On Start the Week Andrew Marr traces the quest to decipher the human genome. The idea of a 'unit of heredity' first emerged at the end of the 19th century: cancer physician Siddhartha Mukherjee recounts the history of the gene and the latest research into genetic heredity and mutation. Giles Yeo looks at what genes can tell us about body weight, while Aarathi Prasad explores how India practises medicine - from cutting-edge science to traditional healing. The historian Emily Mayhew traces the medical breakthroughs that have emerged from the battlefield, from World War I to the conflict in Afghanistan. Producer: Katy Hickman.

Start the Week is at Hay Literary Festival this week discussing war and intelligence. Michael Hayden is a former Air Force four-star general who became director of the US National Security Agency and then the CIA. He talks to Tom Sutcliffe about the decisions made during America's war on terror: from rendition and interrogation to widespread surveillance. Harry Parker was in his twenties when he signed up to join the British Army - he uses the paraphernalia and weaponry of war to tell the story of conflict; while the journalist Janine di Giovanni reports on ordinary people caught up in the fighting in Syria. The human rights lawyer Philippe Sands looks back at his own family's history to make sense of crimes against humanity. Producer: Katy Hickman.

Start the Week is at Hay Literary Festival this week discussing war and intelligence. Michael Hayden is a former Air Force four-star general who became director of the US National Security Agency and then the CIA. He talks to Tom Sutcliffe about the decisions made during America's war on terror: from rendition and interrogation to widespread surveillance. Harry Parker was in his twenties when he signed up to join the British Army - he uses the paraphernalia and weaponry of war to tell the story of conflict; while the journalist Janine di Giovanni reports on ordinary people caught up in the fighting in Syria. The human rights lawyer Philippe Sands looks back at his own family's history to make sense of crimes against humanity. Producer: Katy Hickman.

On Start the Week Andrew Marr talks to the artist Cornelia Parker about the secrets revealed in found objects. Parker's latest exhibition at the Foundling Museum is inspired by the 18th Century tokens left with babies by their mothers. Simon Armitage finds a new way of telling the medieval poem Pearl, an allegorical story of grief and lost love. Archaeologist Cyprian Broodbank explains how Must Farm, the first landscape-scale investigation of deep Fenland, is transforming our understanding of Bronze Age life, while British Museum curator Aurelia Masson-Berghoff celebrates the finding of two lost Egyptian cities submerged at the mouth of the Nile for over a thousand years. Producer: Katy Hickman.

On Start the Week Andrew Marr talks to the artist Cornelia Parker about the secrets revealed in found objects. Parker's latest exhibition at the Foundling Museum is inspired by the 18th Century tokens left with babies by their mothers. Simon Armitage finds a new way of telling the medieval poem Pearl, an allegorical story of grief and lost love. Archaeologist Cyprian Broodbank explains how Must Farm, the first landscape-scale investigation of deep Fenland, is transforming our understanding of Bronze Age life, while British Museum curator Aurelia Masson-Berghoff celebrates the finding of two lost Egyptian cities submerged at the mouth of the Nile for over a thousand years. Producer: Katy Hickman.

World on the Move: on Start the Week Andrew Marr explores how the mass movement of people has changed societies, in a special edition broadcast in front of an audience as part of a day of programmes on BBC Radio 4. The historian Sir Hew Strachan looks back at the largest single influx of people into Britain when 250,000 Belgians arrived during the Great War, while Frank Dikötter explores the biggest forced internal migration as tens of millions of young Chinese were sent to work in the countryside during the Cultural Revolution. The poet Patience Agbabi humanises the mass movement of people with her tale of one refugee's story. And what of those who return? The Bangladeshi author Tahmima Anam looks at what happens when you try to go back home. Producer: Katy Hickman.

World on the Move: on Start the Week Andrew Marr explores how the mass movement of people has changed societies, in a special edition broadcast in front of an audience as part of a day of programmes on BBC Radio 4. The historian Sir Hew Strachan looks back at the largest single influx of people into Britain when 250,000 Belgians arrived during the Great War, while Frank Dikötter explores the biggest forced internal migration as tens of millions of young Chinese were sent to work in the countryside during the Cultural Revolution. The poet Patience Agbabi humanises the mass movement of people with her tale of one refugee's story. And what of those who return? The Bangladeshi author Tahmima Anam looks at what happens when you try to go back home. Producer: Katy Hickman.