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.
The hagfish is a slime-emitting ocean-dweller that's remained unchanged for 300 million years--and it shows. It has a skull (but no spine), velvet smooth skin, and a terrifying pit of a mouth that's lined with rows of razor-sharp teeth.