AP EXPLAINS: How Niagara Falls freezes ... or does it?

NEW YORK (AP) — It's a stunning site: Niagara Falls, the world's most famous waterfall, apparently frozen in place. The icy spectacle, brought on by weeks of severe cold, has drawn a steady flow of intrepid tourists. But are the Falls really frozen? Not exactly. Here's a brief explanation of what really happens when the mighty Niagara River appears to form a crystalline cascade:



AP EXPLAINS: How Niagara Falls freezes ... or does it?



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