Ancient Persians invented year-round refrigeration
Ancient Persians pioneered refrigeration with yakhchals, massive dome structures that stored winter ice through scorching summers using clever evaporative cooling techniques and thick, insulated walls.
Long before modern freezers, ancient Persians mastered refrigeration with yakhchals, massive dome-shaped structures that stored ice year-round in the scorching desert. Dating back to 400 BCE, these engineering marvels, some 18 meters tall, used thick, insulated walls made from a special mortar of sand, clay, egg whites, lime, and goat hair.
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