How did the ancient civilizations used to make ice?
In: Technology
In deserts, at least in North Africa and the Middle East, ice was made by exposing water to the night sky and then keeping it very well insulated during the day. Even if the air temperature didn’t dip below freezing, the heat radiating from the water into the cold, black sky would allow it to freeze. This is known to have been done in ancient times, thousands of years ago.
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