Rebecca Earle joined me on the pod to talk about spuds. She took me through the story of this a starchy tuber's dramatic career, which has been at the heart of the development of the world we live in today. Jumping from an Enlightenment super-food, to symbol of the British Home Front and even a coercive tool in modern China, this unassuming root vegetable - rich in carbohydrates - has been quite the hot potato.