Fig. 1:  THE FAR SIDE OF THE MOON TODAY  The far side surface has endured the same unrelenting asteroid bombardment as the near side over the past 4.5 billion years. But obviously, much less mantle basalt erupted through fissures in the crust onto the far side surface. The far side anorthosite crust is thicker and fissures within it likely did not connect all the way from the molten mantle basalt to the surface nearly as often.