German Icebreaker Polarstern 2 (IMAGE) Census of Marine Life Caption The Polarstern is a double-hulled icebreaker operational at temperatues as low as 50 degrees C. Credit Alfred Wegener Institute for Polar and Marine Research 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.