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flag A squirrel likely made Chicago’s "Rat Hole" imprint, study says.

flag A mysterious sidewalk imprint in Chicago’s Roscoe Village, once dubbed the "Rat Hole" and widely believed to be made by a large rodent, was likely created by a squirrel, according to a new study. flag Researchers analyzed the mark’s shape and compared it to local rodent species, finding a 98.67% match with the eastern gray squirrel. flag They concluded the animal probably fell into wet concrete while climbing a tree, leaving a near-perfect body impression. flag The study, published in Biology Letters, highlights how scientific analysis can clarify viral internet mysteries. flag The original slab was moved to Chicago City Hall as a local curiosity.

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