Dr. Eyvind Thor, University of Tennessee at Knoxville (image) University of Tennessee at Knoxville Share Print E-Mail Caption UT's first Tennessee Tree Improvement Program Director, Dr. Eyvind Thor, sought blight resistance in American chestnuts, but the task ultimately failed. The tools of science that made this year's release possible hadn't been established yet. Credit Photo by Frank Berggren Usage Restrictions None 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.