The Medieval Water Bag That Stayed Cool in Sun
Автор: In The Beginning
Загружено: 2025-12-18
Просмотров: 105
Описание:
Medieval travelers crossed deserts and roads without metal bottles or ice — yet their water stayed cool in full sun. The secret was a porous natural water bag that used evaporation instead of insulation.
This video explores how these bags were made, why they cooled water below air temperature, and why plastic bottles completely fail by comparison.
Once you understand the physics, you’ll see why this medieval design still outperforms modern containers in hot climates.
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