Here's what Niagara Falls looked like when it was turned off for the first time in 12,000 years

Here's what Niagara Falls looked like when it was turned off for the first time in 12,000 years

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Niagara Falls dried up in 1969. AP In 1969, the US Army Corps of Engineers dumped 27,000 tons of rock to dam the Niagara River and stop the American Falls. They were assessing a growing pile of boulders at the bottom out of concern the falls could become rapids. But in the end, engineers found the…

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