Bacon sandwiches, drinking while pregnant, obesity - health risks are a favourite with the media. But behind the simple numbers quoted in the headlines lies a huge and sophisticated body of statistical research. We talk to Professor Sheila Bird of the Biostatistics Unit in Cambridge about her work in public health and its impact on policy, and discuss bias in pharmaceutical studies, as recently highlighted by the controversy around antidepressants.

We talk to four researchers from UCL's centre for mathematics and physics in the life sciences and experimental biology (COMPLEX) about the role of maths in such fields as astrobiology, cancer modelling and biology.

We talk to Professor Chris Budd about the greatest mathematician of all - Leonard Euler. We also talk about maths communication, maths in the food industry and the best mathematical pickup lines.

We talk to Nira Chamberlain about his job as a modelling consultant involving aircraft carriers, telecommunication networks, staying slim and speaking French.

We talk to Shahn Majid about a whole new geometry of space, find out about how mathematics is combatting climate change, as well as all the latest news from the world of maths.