Cells in Slow Motion (IMAGE) Universität Leipzig Caption Fluorescence images showed that cells did not visibly change morphologically. The slowing down of their dynamics was solely due to the presence of heavy water. Credit Photo: Leipzig University 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.