Antarctica's Topography (image) University of Arizona Caption This 3-D reconstruction of the topography hidden under Antarctica's two-mile-thick coating of ice was made using data from radar surveys. Glaciers started carving Antarctica into the current mountain-and-fjord landscape 34 million years ago, according to new findings from University of Arizona geoscientist Stuart N. Thomson and his colleagues. Credit Courtesy of Stuart N. Thomson/UA department of geosciences Usage Restrictions This image may only be used to accompany a story about the research described in the release, 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.