How's your reward smile? Drs Chris and Xand van Tulleken take to the fields of Hay Festival and test the public on 3 main kinds of smiles. What's Up Docs | Listen on BBC Sounds #hayfestival | BBC Radio 4

What’s up Docs? Introducing a new BBC Radio 4 podcast where Drs Chris and Xand van Tulleken are on a mission to help us take better care of ourselves. Each episode, Chris and Xand are joined by an expert guest to examine the latest research, psychological insights, and data, to help listeners navigate the overwhelming amount of information and advice out there. What’s Up Docs? | Listen on BBC Sounds | BBC Radio 4

Can I get better at doing difficult things? Chris and Xand van Tulleken want to know. In their new podcast for Radio 4, the Van Tulleken brothers explore every aspect of our health and wellbeing. In this episode they want to know about willpower. What does it do? Can any of us get better at doing difficult things? What’s Up Docs? | Listen on BBC Sounds | BBC Radio 4