According to mainstream science:
1. Gravity answers all metaphysical questions (instead of 'God did it' just substitute gravity): gravity did it.
2. Dark Matter, Dark Energy, and Dark Flow explain all astronomical observations.
3. Tidal Forces explain all geological topography and falsifications of gravitation and plate tectonics.
Science Daily: Formation of Bulge on Far Side of Moon Explained.
ScienceDaily (Nov. 12, 2010) — A bulge of elevated topography on the far side of the moon -- known as the lunar far side highlands -- has defied explanation for decades. But a new study led by researchers at the University of California, Santa Cruz, shows that the highlands may be the result of tidal forces acting early in the moon's history when its solid outer crust floated on an ocean of liquid rock.LOL. Nevermind the fact that this is utterly impossible.
"Below we will show some of the simple physical reasons why the present geodynamic and geotectonic paradigms are so dramatically wrong, and why continents cannot move like 'rafts' on a 'sea' of convecting semifluid hot mantle." -- Stavros T. Tassos (seismologist) and David J. Ford (geologist), 2005