The Moon's highlands may have been thrown up billions of years ago by a slow-motion collision with a smaller companion moon that had been knocked off its orbit.
Source: http://www.cosmosmagazine.com/news/4581/moons-mountains-made-slo-mo-crash
Cristina Dumitru Daisy Fuentes Dania Ramirez Danica Patrick Daniella Alonso Danneel Harris Deanna Russo
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