CHICAGO — A new study suggests that the city's iconic "Chicago Rat Hole" is likely the imprint of a completely different rodent.

In an article published by The Royal Society, a research team compared and analyzed the measurements of the "Chicago Rat Hole" to eight sympatric rodent species commonly observed in the Chicago area.

According to the study, the imprint is likely of a squirrel.

"Discriminant function analysis indicated a 98.67% likelihood that the ‘Chicago Rat Hole’ was a squirrel, with classifications split between the eastern grey squirrel (50.67%) and the fox squirrel (48.00%). Given local population densities, an eastern grey squirrel likely represents the most parsimonious species-level match," the article states.

The study continues by adding that the elongated forelimbs

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