Photograph: Larisa Stefanuyk/Getty ImagesHow on earth did humans learn to bake? Presumably the short answer is “through trial and error”, but what possessed them to grind ears of wheat into flour in the first place? And then to mix it with water and yeast and cook it? Ellie Westcombe, LondonPost your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.
