Eli5: How did people make and keep ice in medieval times, and how do we manufacture ice cubes now ?
In: Technology
For storage, a lot of people have mentioned insulation which is huge for ice houses, another addition to these was to make them deep in the ground, if you had earth you could dig into the temp at anything 10 feet or below (maybe even less) stays around 55 degrees no matter what is happening on the surface so you already had an advantage of not having to insulate against really hot temps as long as you could build your ice house a bit deeper.
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