Icebergs on the move (IMAGE) McGill University Caption Polar ice sheets evolve on various different time scales and are in constant flux, with the ice growing and retreating depending on the climate and the surrounding water levels. CREDIT: This image was taken in Iceberg Alley in the central Scotia Sea during Integrated Ocean Drilling Program Expedition in 2019 Credit Thomas Ronge Usage Restrictions None License Licensed 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.