But the best way to check the new hypothesis would be for selenologists to get their hands on rocks from the far side.

但是，对月球学家来说，检查这个新假说的最好方式就是找到月球较远那侧的岩石。

Sure enough, different parts of the present moon's crust, recovered by various missions to the lunar surface, differ in age by up to 200m years, a fact that has long puzzled selenologists but which the impact theory neatly explains.

这也意味着这个月球的岩石要年久的多。果真如此，现在月球外壳的不同部分，各次去月球表面的探测任务发现，这些岩石年代的不同达到2亿年之久。一个长期困扰月球学家的客观事实被碰撞理论巧妙地解释了。