American democracy was born in Philadelphia, and the Republic faced challenges at Valley Forge and Gettysburg. Pennsylvania played a pivotal role in United States history, but today its major cities are home to great arts institutions and important technological research. Beyond the cities, Pennsylvania's countryside includes breathtaking wilderness areas, hidden architectural gems and charming Amish towns.
Want better willpower? Learn how to just say no with this step-by-step guide on boosting your self-control. In this one-minute video, Ask Smithsonian host Eric Schulze dishes on the science behind willpower – what saps it and what makes it stronger