Elodie Briefer researching (IMAGE) University of Copenhagen - Faculty of Science Caption Elodie Briefer and her collaborators used emotionally charged animal sounds to investigate the behavioral reactions of pigs, horses, wild horses and wild boar Credit Kristian Bjørn-Hansen, Copenhagen University Usage Restrictions Use restricted to the context of Elodie Briefers research and with the appropriate captions and credits 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.