#12: The Secret “Pyramid-Building” Ice Machine of the Pharaohs
Many might picture the ancient Egyptians simply enduring the desert heat with no relief. However, they had a smart technique to make ice during the hot summer months. Archaeologists found evidence of wealthy citizens pouring water into shallow, porous clay vessels and placing them on straw mats in deep stone-lined trenches overnight. The dry desert winds and evaporation allowed the water to freeze solid by morning. This method provided cool drinks to royal families under the hot sun.
