http://www.wired.com/wiredscience/2012/12/grail-moon-probes-results/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+wired%2Findex+%28Wired%3A+Top+Stories%29&utm_content=Google+Feedfetcher gravity mapping of the moon. a couple nice videos with the article