Rebecca Earle joined me on the pod to talk about spuds. She took me through the story of this 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. 

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