David Baddiel tries to understand crying: why does water come out of our eyes when we get emotional? David sets off to meet two experts who have each studied this. They have lots of theories, but is there an answer? Producer: Giles Edwards

David Baddiel tries to understand global trade. With trade in the headlines - from both Brexit and President Trump - David is keen to understand how world trade works (or doesn't), and where the World Trade Organisation fits in. With help from Dr. Meredith Crowley, an expert in international...

David Baddiel tries to understand how the fashion industry works: what makes things fashionable? David is challenged by a listener from Wigan to explain why, when he needed to attend a family party a few years ago, the only trousers available to buy then were pleated. This sets David off on an...