Sheep Jaws Studied (IMAGE) Universitat Autonoma de Barcelona Caption The study on the remains of animals found at the site of the Chaves cave in Huesca, led by the Universitat Autònoma de Barcelona, obtains new data on the control of breeding and feeding of the first domesticated sheep heards found in the western Mediterranean region during the Neolithic. The modification of their natural birthing cycles affected their physiology and resulted in prolonged periods of fertility. Credit Alejandro Sierra Usage Restrictions Credit must be cited 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.