lunar mining

[Somatochlora]

To tell the truth, I don't know what to think of the theory. I would like to read the actual paper(s) and what they are viewing as evidence. I don't think the media does or is capable of breaking something like this down and giving the info. It seems like they are saying that the far side is the actual landscape of the 2nd moon? I don't know how 2 bodies of that size could hit hard enough to become a single fairly uniform sphere without becoming molten and amorphous. Trying to get my head around that. Especially as it supposedly hit hard enough to push the molten center to the near side? enough force to push that through the upper layers, some of which would be solid I would expect but, without some sort of fracture pattern between the near and far sides? No back slop?