Museum mastodon 1 (IMAGE) American Museum of Natural History Caption The Warren mastodon, which was the first complete American mastodon skeleton found in the United States, on display in the Paul and Irma Milstein Hall of Advanced Mammals at the American Museum of Natural History. Credit D. Finnin/ © AMNH Usage Restrictions Can be used with appropriate credit License Licensed content 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.