Chocolate candy bars, brownies, chocolate milk, truffles, after-dinner mints, chocolate chip cookies - if it contains chocolate, we love it! Whether it's hot or cold, liquid or solid, it seems that the world just can't get enough chocolate! In fact, even though the USA is only the eighth biggest chocolate consumer in the world, it still manages to spend over five billion dollars on chocolate each year! The champion of chocolate-eating is in fact the tiny nation of Switzerland, whose inhabitants consume around 21 pounds of chocolate per person each year. But what is it that makes chocolate so irresistible to so many people? Let's first take a look at the history of chocolate, before we go into a detailed scientific analysis of the world's favourite treat.

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