Douglass Jacobs, Purdue University (IMAGE) Purdue University Caption Douglass Jacobs examines a young hybrid of the American chestnut. He expects the trees could be reintroduced in the next decade. Credit Purdue University file photo/Nicole Jacobs Usage Restrictions None 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.