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The Native Americans in Arizona had developed something similar, long before Europeans showed up. https://en.wikipedia.org/wiki/Arizona_bajada_canals https://e
by Turing_Machine 4y ago
The Native Americans in Arizona had developed something similar, long before Europeans showed up.
https://en.wikipedia.org/wiki/Arizona_bajada_canals https://en.wikipedia.org/wiki/Arizona_bajada_canals