Yellowstone National Park (image) S.J. & Jessie E. Quinney College of Natural Resources, Utah State University Share Print E-Mail Caption People recreating in Yellowstone National Park, the world's first protected area. Protected areas like Yellowstone are invaluable, but they not enough to adequately conserve endangered species in the United States. Credit Edward Hammill/Utah State University Usage Restrictions None 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.