LAMP Nugget (image) Southwest Research Institute Share Print E-Mail Caption This graphic illustrates water molecules scattering on the lunar surface. As rough, irregularly shaped grains heat up over the course of a day, the molecules detach from the regolith and hop across the surface until they find another location cold enough to stick. Credit PSI/Amanda Hendrix Usage Restrictions Images/videos may be used by the media and the public for educational and informational purposes only Share Print E-Mail 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.