Surgeon Richard Babor looks at whether the food we eat can influence our risk of getting cancer. Plus, he discovers how ancient eating patterns could hold the key to cancer prevention.

Forty percent of cancers can be prevented by lifestyle changes. In this episode, Richard looks at the impact of sleep and stress, as well as examining our relationships with popular vices.

Richard explores how medicine and technology can prevent cancer. He looks at whether genetic engineering could offer the ultimate cancer prevention.

Richard looks at how the environment can influence our cancer risk. He examines our relationship with the sun, air pollution and chemicals - and also discovers how our first contact with the world can impact our heath.