Tracking Ivory: the Science of Saving Elephants (video) University of Washington Share Print E-Mail Loading video... Caption University of Washington biologist Samuel Wasser uses DNA evidence to trace the origin of illegal ivory to combat an international trade that is decimating African elephant populations. Credit Courtesy of The Seattle Channel Usage Restrictions Credit required. 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.