Water and Their Precursors (IMAGE) Proceedings of the National Academy of Sciences Caption Water and their precursors were stored in lunar silicates and released into the gas phase by (micro)meteorite impact. Credit Molecules and data courtesy of Cheng Zhu and Ralf I. Kaiser; background image courtesy of NASA/Goddard/Conceptual Image Lab. 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.