On this day in 1947, researchers at Harvard working on one of those new-fangled computers discovered an error. After running some checks on the system, they figured out that they had a computer bug on their hands gumming up the works. Literally. There was a moth trapped inside.
Learn more about the events of September 9s throughout history and wish Adam Sandler a happy 49th birthday with the video above. And watch more days in history at Timeline.