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.
However, scientists still have doubts about this idea due to the chemistry of the moon. Models of the giant impact often say the moon should be about 70 percent Theia. The problem is, most planets in the solar system have unique chemical makeups, and the Earth and its moon should, too.