Pennsylvania is a state full of historical and geographic firsts. It is officially known as “The Keystone State,” honoring its central location among the original 13 colonies. Three fun facts about Pennsylvania include:A Groundhog Forecaster: Punxsutawney, Pennsylvania, is the proud home of the world-famous weather-forecasting groundhog, Punxsutawney Phil, who “predicts” the arrival of spring every February 2nd.The World’s First Computer: The Electronic Numerical Integrator and Computer (ENIAC)—the first general-purpose electronic digital computer—was built in 1946 at the University of Pennsylvania in Philadelphia. The First Public Zoo: The Philadelphia Zoo officially opened to the public in July 1874, making it the oldest zoo in the United States.