Earlier this week I spent half an hour trudging through my online supermarket order and thinking about the advice on eating a varied diet. As I dutifully included a multi-coloured assortment of fruit and vegetables, protein and so on, I wondered, not for the first time, why human food has to be so complicated and take up so much time. There’s the shopping, the planning, the cooking, the serving, clearing up the spills, cleaning the fridge—it seems a great deal of effort. After all, cats seem quite happy with cat food, cows eat grass, and reindeer warble flies survive perfectly well on reindeer tissue.
Indeed, not only do most animals have a narrow diet, but a varied one can be positively harmful. During the Second World War Continue reading