Hidden Forest (IMAGE) Earth Institute at Columbia University Caption In Manhattan's Terminal Warehouse, Lamont-Doherty Earth Observatory tree-ring lab director Edward Cook extracts a straw-width core from a standing wooden beam. Credit Caroline Leland Usage Restrictions Credit must be given. License Original 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.