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.
For six weeks, luna moth caterpillars gorge themselves on the leaves of the marula tree. Then, when they're ready, they instinctively weave giant cocoons around themselves in preparation for their stunning metamorphosis.