8-Mile Pack wolf pups, Yellowstone National Park (image) European Geosciences Union Share Print E-Mail Caption The mid-1990s reintroduction of wolves to Yellowstone, where they were once eradicated, is one of the success stories of rewilding. In this photo from 2013, pups from the 8-Mile wolf pack are shown gathered on an outcrop. Credit U.S. National Park Service via Flickr Usage Restrictions Per NPS restrictions Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.