Bugün öğrendim ki: 400BC'de Persler, buharlaşmayla soğutma kullanarak çölde buz yapmanın bir yolunu buldular.

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Ancient Persian ice-house **Yakhchāl** ([Persian](/wiki/Persian_language "Persian language"): یخچال‎ "ice pit"; _yakh_ meaning "ice" and _chāl_ meaning "pit") is an ancient type of [ ice house](/wiki/Ice_house_\(building\) "Ice house \(building\)") that functions as an [evaporative cooler](/wiki/Evaporative_cooler "Evaporative cooler"). Above ground, the structure had a domed shape, but had a subterranean storage space. It was often used to store ice, but sometimes was used to store food as well. The subterranean space coupled with the thick heat-resistant construction material insulated the storage space year round. These structures were mainly built and used in [Persia](/wiki/Iran "Iran"). Many that were built hundreds of years ago remain standing.[1]