Ning Zeng with log (IMAGE) University of Maryland Caption University of Maryland Atmospheric and Oceanic Science Professor Ning Zeng holds the 3,775-year-old log that is the subject of a new study in Science. Credit Mark Sherwood, University of Maryland Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. Adaptations must be shared under the same terms. License CC BY-NC-SA 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.