In recent years, workers began restoring 4,000 acres at Delaware's Prime Hook National Wildlife Refuge. Today, new dunes stand nearly 10 feet high as grasses thrive and wildlife returns

Scientists are bringing a damaged delaware wetland back to life begins with a massive repair effort at Prime Hook National Wildlife Refuge. The $38 million project is restoring about 4,000 acres of damaged coastal wetlands. Crews rebuilt two miles of beach and barrier dune after major storms. They also created 25 miles of channels to restore natural tidal flows. The work could offer lessons for vulnerable U.S. coastlines.