New England Boating/Photo Illustration.

New England Boating/Photo Illustration.

The freezing patterns of Massachusetts’ Merrimack River have changed significantly over the last 100 years, and nobody is exactly sure why, according to an article on

According to the article, the Merrimack River used to frequently freeze so solidly that horses and sleighs could safely cross it. But nowadays, even during bitterly cold winters, that doesn’t happen. Experts are trying to understand what has changed.

Read more about the Merrimack River’s freezing patterns.



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