How Ancient Iran Made Ice in the Desert #thesurvivalbunker #militaryhistory #army

Added: 2026-05-26

[00:00:00]While invaders baked to death in 50° heat, defenders inside the BAM citadel were chilling ice using zero technology.

[00:00:09]2 m mud brick walls acted as heat batteries, keeping interiors 20° cooler than the desert outside.

[00:00:16]Vertical wind catcher towers called badgers used pressure differentials to continuously pull cool air through the fortress while extracting hot air out.

[00:00:26]Underground ice pits called yakils connected to subterranean water channels called canots kept food preserved and water chilled through an entire siege.

[00:00:37]Invaders had none of this.

[00:00:39]No shade, no cold water, no preservation.

[00:00:44]Their armies collapsed from heat exhaustion and supply failure, not from the sword. The BAM citadel was not just a fortress.

[00:00:54]It was a thermal weapon and it was built from mud, wind, and physics over 2,000 years ago.

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