Comment by sempron64 | Hacker News Reader

Top New Best Ask Show Jobs

Comment by sempron64 | Hacker News Reader

The first tunnel of this kind is of interest also https://en.m.wikipedia.org/wiki/Siloam_tunnel

Another page about this kind of technology: https://en.wikipedia.org/wiki/Qanat

That taught me they had ice houses in Persia in 400 BCE (https://en.wikipedia.org/wiki/Yakhchāl)

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