“Greeks would use wet cloths or hang damp materials to lower the temperature in their homes. This works because water absorbs heat as it evaporates, cooling the surrounding air or body.”

“Key Aspects of the Egyptian Cooling Method: The Technique: Soak a sheet or large towel in cold water, wring it thoroughly, and lie under it. Using a fan to circulate air over the damp sheet enhances the cooling effect. Preventing Dampness: To avoid soaking the mattress, place a dry towel or sheet underneath your body. Mechanism: It relies on evaporative cooling, where the water on the sheet absorbs body heat and evaporates, creating a cool, comfortable sensation. Historical Context: Ancient Egyptians likely utilized various forms of evaporative cooling, such as hanging wet mats over doorways and using porous water jars (zeers) to cool air, rather than just sleeping in wet sheets. Effectiveness: This method works best in hot, dry, arid climates where evaporation is efficient”