『Why Are Barns Red?』のカバーアート

Why Are Barns Red?

Why Are Barns Red?

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Barns are red across farm country almost everywhere, and nobody ever chose the colour. The answer is rust: iron oxide mixed into linseed oil made a cheap homemade wood preservative that killed the moss and mildew rotting untreated timber — and iron oxide happens to be red. Why the convention outlived the chemistry, why Sweden's barns are the same colour for the same reason, and why some dairy country went white instead.

This episode was produced with AI narration and scripting, with human editorial review.

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