Food is both fuel and medicine, but this doesn’t mean we have to strip it bare of its magic and reframe it as a power source for some robot-like, maximally efficient human body. Yes, the reality is that food is a basic, physical human need. It is fuel, in a sense, and by extension, we are machines that need fuelling. But we’re also thoughtful

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Water World: From glaciers to rivers to our relationship with water across cultures and history. This chapter covers water cycles and our influence on the future of water.