Study claims to solve mystery behind infamous 'Chicago Rat Hole'

Study Claims to Solve Mystery Behind Infamous 'Chicago Rat Hole'

A recent study published in Biology Letters may have finally solved the mystery of the infamous "Chicago Rat Hole" on the sidewalk.

Scientists believe that the outline is not of a rat, but more likely a squirrel, based on the measurements of the imprint. The impression resembles a squirrel: stocky and semi-aquatic, with webbed feet.

The Chicago Rat Hole was previously located near Roscoe Street and Damen Avenue before it was removed.

The impression of the outline is not of a rat - but more likely a squirrel.

Author's summary: Scientists solve Chicago Rat Hole mystery.

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ABC7 News ABC7 News — 2025-10-15

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