Top Predators Key to Extinctions as Planet Warms (3 of 3) (image) Yale University Share Print E-Mail Caption This image shows melting ice from the Nizina Glacier, Wrangell‑St. Elias National Park and Preserve, Alaska. Credit National Park Service 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.