Mouse (IMAGE) Field Museum Caption The shaggy soft-haired mouse, found in this study to experience changes in size based on which side of the Andes Mountains the individual lives on. Credit Pablo Teta Usage Restrictions Please include credit License Original 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.