Good Memory (image) University of Chicago Caption Jason Bruck, who completed his Ph.D. this summer at the University of Chicago, is pictured here working with a dolphin at the Brookfield Zoo near Chicago. His research indicates that dolphins have the longest social memory ever recorded among non-human species. Credit Jim Schulz/Chicago Zoological Society Usage Restrictions News organizations may use this image in connection with reports about the research of Jason Bruck. 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.