Whooping cough on the rise

We look at the reasons behind a recent surge in Whooping cough cases in Europe and Asia. Also on the program: why are women more susceptible to heat-related mortality, the small patches that could revolutionise vaccines, and the recent Northern Lights sightings have us looking at the psychology of awe.Presenter: Claudia Hammond Panellist: Smitha Mundasad Producer: Margaret Sessa-Hawkins