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.
Have you ever wondered how a simple shot can keep you from dying a horrible death? In this one-minute video, Ask Smithsonian’s host, Eric Schulze, unravels how vaccines boot-camp our bodies into shape, getting us ready to fight off deadly diseases.