Why do bad smells smell bad?

Why do bad smells smell bad?

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Reddit Chemistry: Why don't birds get shocked on power lines? (and other questions)

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How do fans cool us off?

#230 Winter has us longing for warmer weather. BUT when it's a hot day how do fans keep us cool? Do fans actually lower the air temperature? What role does evaporative cooling play? Find out how the movement of air molecules around your body is the key to feeling cooler. Plus, di ...  Show more

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