Phi for All

Dear Mr./Mrs.,

I’m an astronomy fan from China. I’ve been doing various research on the Moon recently especially its formation, maria, highlands and some other aspects of the Moon. Due to my limit knowledge in this area, I still have a few questions can’t be explained properly with the material and data I have in my hand right now. I’m writing to you to ask these question. Really appreciate your time and help!

1.  Why almost all maria are on the near side of the moon, while there’s only 2% on the far side?

2。 Are moon highlands caused by crustal movement? Is it irregular since its formation or caused by the crustal movement?

3，  What stages has the Moon been going through since its formation?