Eli5: How did people make and keep ice in medieval times, and how do we manufacture ice cubes now ?
In: Technology
No one here has mentioned that you could *make ice in the desert* as far back as 400BCE.
Humanity was *making ice* looooong before the 1900s, and long before medieval times.
https://en.m.wikipedia.org/wiki/Yakhch%C4%81l
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