On Tuesday, the space agency released before-and-after pictures of the lunar north pole where Ebb and Flow came to rest.

NPR: NASA Moon Craft Spots Ebb And Flow Crash Sites

The proportion of Republicans among 20-somethings has reached its lowest ebb since records began to be kept after the second world war.

ECONOMIST: Lexington

Ebb and Flow deliberately plunged into a lunar mountain in December after mapping the moon's gravity field in unprecedented detail.

NPR: NASA Moon Craft Spots Ebb And Flow Crash Sites

After all, foreign private-portfolio investments in the U.S. ebb and flow with the emotional current, no easy factor to predict.

FORBES: No Greenback Crash