Bar-Headed Goose in Flight (IMAGE) University of Exeter Caption Researchers tested how good the geese were at coping with exercise in reduced oxygen environments by simulating the conditions of Mount Everest in a clear box and then getting the birds to run as fast as possible on a treadmill inside the box. Credit Nyambayar Batbayar Usage Restrictions Credit: Nyambayar Batbayar 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.