Students enrolling in Carnegie Mellon University Tepper School of Business have an average GMAT of 690, which is much higher than average compared to all business schools (613).
But how did it end up being this pure in most parts of the Moon? The secondary event that explains it, notes the report, is what researchers are calling a crustal overturn. Old impure plagioclase was replaced by hot, pure plagioclase as the moon cooled rapidly. Asteroid hits, space dust, and other harsh space conditions could have also sheared away the surface impurities, notes the report.
It is slowing down mainly due to its rotational energy being transferred to the moon. The gravitational interaction between the earth and the moon result in the earth slowing down (by a TINY amount) and the moon's orbit getting more distant. The more distant the moon becomes, the less effect it will have on the Earth; but less and less never equals zero.