Replies

Credit: Leiden University

1 posted on 09/16/2023 8:32:12 AM PDT by SunkenCiv

To: SunkenCiv

How did the “ancients” construct 20 meter deep water channel shafts, with a horizontal water channel below?

3 posted on 09/16/2023 8:50:49 AM PDT by KrisKrinkle (c)

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