USU Luminescence Lab (IMAGE) Utah State University Caption In the Utah State University Luminescence Lab, graduate student Hawke Woznick uses sieves to prepare sediment samples from Greenland's Camp Century for OSL dating. USU Geosciences Professor Tammy Rittenour and colleagues reported findings about the samples in the July 20, 2023, issue of the journal 'Science.' Credit USU/Levi Sim Usage Restrictions Credit Author 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.