This is a pee-pee boy, and it’s used by tea enthusiasts to test whether water is hot enough to brew tea. Some say it’s the oldest thermometer in the world. But how does it work? We look at the science behind it. | Goldthread
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This is a pee-pee boy, and it’s used by tea enthusiasts to test whether water is hot enough to brew tea. Some say it’s the oldest thermometer in the world. But how does it work? We look at the science behind it. | Goldthread
2.5M viewsOct 28, 2020
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