Ancient Sumer’s Secrets: How They Defied Heat to Preserve Food Without Electricity!
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Thousands of years before the invention of electricity, the Sumerians devised an amazing way to preserve food amidst the scorching heat of Iraq!
In the ancient cities of Mesopotamia, people used a simple system based on two earthenware jars, one placed inside the other. The space between them was filled with water to naturally cool the food. The outer jar allowed some of the water to slowly seep through the clay, and as it evaporated, the temperature inside the inner jar dropped. This is a scientific concept known today as evaporative cooling.
In some areas, these jars were partially buried underground to retain moisture and reduce the effects of the sun's heat, helping to keep milk, dates, and vegetables fresh for longer periods.
This ancient invention was later known in Iraq as “Al-Hibb,” and its concept is still used today in some villages and rural areas without the need for electricity or modern technology. Interestingly, this method later inspired sustainable cooling technologies in several countries, as the idea relies entirely on nature, clay, and water, without any artificial energy.
Source: British Museum, Journal of Archaeological Science, National Geographic.
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