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The original was posted on /r/todayilearned by /u/AlabamaHotcakes on 2025-07-14 20:37:04+00:00.

Original Title: TIL about Qanats, which is a water supply system that was developed in ancient Iran for the purpose of transporting usable water to the surface from an aquifer or a well through an underground aqueduct. Proving crucial to water supply in areas with hot and dry climates.