Meet 'Ebb' and 'Flow' -- NASA's New Moon Probes

NASA's twin GRAIL satellites, currently maneuvering into position for an innovative moon mapping mission, have new names: Ebb and Flow.<img src="http://feeds.feedburner.com/~r/DiscoveryNews-Top-Stories/~4/WdMt0a3kPCc" height="1" width="1"/>

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