VALLEY FORGE, Pa.—The national park on the site where George Washington and the struggling Continental Army endured a tough winter during the American Revolution boasts a new feature that’s a couple of hundred million years old—dozens of fossilized dinosaur footprints discovered on rocks used to pave a section of a hiking trail.
Fossilized dinosaur footprints are shown on a paving stone at the Valley Forge National Historical Park in Valley Forge, Pa. Feb. 28, 2019. Matt Rourke/AP Photo
