Ever wonder how Chicago turns its river bright green every St. Patrick's Day? Spoiler: It starts with orange powder, plumbers' coveralls gone wrong, and a wild 1960s accident that became a city tradition. In this episode, we dive into the bizarre history and science of fluorescein dye, the secret vegetable-based formula, and why fish don't seem to mind. Laugh along as a baffled science nerd unpacks one of the most absurd holiday stunts on Earth.