Ph.D. Student Raymond Allen (image) University of Illinois at Urbana-Champaign, News Bureau Share Print E-Mail Caption Duke University Ph.D. student Raymond Allen collects a cheek swab for analysis. All DNA samples and data were destroyed upon completion of the exercise. Credit Photo by Fred Zwicky Usage Restrictions Image may be used only with stories about the events described in this release. Credit required: Photo by Fred Zwicky. 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.