(IMAGE) Eötvös Loránd University Caption We suggest that pigs might lack important characteristics that are crucial for the emergence of this sort of communication Credit Photo: Paula Perez Fraga / Eötvös Loránd University (ELTE) Usage Restrictions Credit must be given 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.