Summary: The GRAIL mission has officially ended as its two satellites, Ebb and Flow, has been commanded to crash into the surface of the moon. It was decided to direct a crash landing when the fuel ran out rather than wait for an eventual, unpredictable fall so as not to destroy any of the historic landing sites like the Apollo site. (Imagine if a satellite fell and knocked over the American flag!)
Most of the data from these two satellites has not been fully analysed yet, but scientists do know that the data from these two provide the most detailed map of the surface of the moon that we have to date. As usual, for for details, check out the original article.
BBC News: http://www.bbc.co.uk/news/science-environment-20761903
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