Chicago’s viral “Rat Hole” wasn’t a rat at all! Scientists reveal the real culprit

A viral internet sensation, the “Chicago Rat Hole,” has been scientifically identified as a squirrel imprint, not a rat’s. Researchers analyzed detailed measurements from photographs, comparing them to local rodent species. The study revealed a 98.67% likelihood of a squirrel, likely an Eastern grey or fox squirrel, being responsible, highlighting how curiosity can drive scientific discovery from unexpected sources.