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These structures, called yakhchāls (Persian for 'ice pit'), used a brilliant combination of evaporative cooling, thick insulation, and subterranean storage. Ice was created in shallow winter ponds, often shaded by tall walls, then transferred deep inside the dome. The key was a special, water-resistant mortar called sarooj, made from sand, clay, lime, ash, and even egg whites or goat hair, which sealed the walls. While ancient Chinese also stored ice earlier, the Persian design was specifically
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5 haunting subterranean structures from around the globe
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. An enormous, abandoned ant colony filled with cement and excavated: This research shows what a subterranean ant structure looks like. Note: The ant colony was abandoned. Batang 80's, 90's , 2000's ?? -aquarius- LIKE: - Mga Batang 90's- | Smile Ka Din, Konti Lang.
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Collins Demolition removing substantial subterranean structures after above ground demolition of former commercial and industrial units has been completed #collinsearthworks #collinsdemolition #demolition #construction #recycling #heavyequipment | Collins Earthworks Ltd
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