A Facebook post recounting the ahead-of-its-time ingenuity of so-called "tide-millers" in Nova Scotia in the 18th century caught the attention of readers in early September.

The post, which included a striking image of a mill attached to a rock face, claimed wooden water wheels built in narrow inlets were used to harness the extreme tides in the Bay of Fundy to grind grain, saw lumber and power small forges.

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