Mesic Shrub Tundra in Northwestern Alaska (IMAGE) Proceedings of the National Academy of Sciences Caption Mesic shrub tundra in Northwestern Alaska, similar to the environment humans occupied in Beringia during the Last Glacial Maximum. Credit PNAS Usage Restrictions None 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.