Not the dance, that's merengue, which has plenty of chemistry, too. This concerns that delicious sweet fluff that tops your lemon meringue pie or the lightweight candy sold at bake sales. It's made by beating egg whites into a foam, which can then be cooked. But getting it right is tricky. It may help to know the scientific reasons it might not turn out they way you expected. Smithsonian's Food and Think blog tells you all about the meringue that went wrong. Link
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