A team of researchers from the NASA Lunar Science Institute (NLSI) at the Ames
Research Center in Moffett Field, Calif., tracked the history of crater formation on the moon using digital maps, and found evidence of a dramatic shift in the velocity and energy of the asteroid bombardment during a period called the “lunar cataclysm” that occurred 4 billion years ago.
Read more: http://forcetoknow.com/space/asteroids-smacked-moon-stronger-period-lunar-cataclysm.html
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