Vasilii Petrenko, University of Rochester (1 of 2) (image) University of Rochester Share Print E-Mail Caption Vasilii Petrenko, assistant professor of earth and environmental sciences, holds a 50,000-year-old ice sample from Taylor glacier in Antarctica. Credit Photo by Adam Fenster/University of Rochester.) 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.