African Elephants Use Their Trunks To Smell Their Surroundings (image) Cold Spring Harbor Laboratory Share Print E-Mail Caption They have five times more olfactory receptors than humans, and the most of any animal characterized to date. Credit Photo courtesy of Eric Green. Usage Restrictions Image may only be used with appropriate caption and credit. Share Print E-Mail 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.