Shozo Yokoyama, Emory Health Sciences (IMAGE) Emory Health Sciences Caption Shozo Yokoyama, an evolutionary biologist at Emory University, previously headed up efforts to construct the most extensive evolutionary tree for vision, including 500 species of animals, from eels to humans. Credit Bryan Meltz, Emory Photo/Video Usage Restrictions Must include credit License Licensed 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.