How about this? I know you're all Grauniadistas so have probably read all about it already, but here's my take on it:
About a squazzillion years ago, a Mars-sized planet crashed into the raw embryonic thing that was to become the Earth. It left a huge hole, which much later became the Pacific Ocean. But the debris flew off into space and became two moons.
After a while, the laws of physics caused the smaller moon to collide gently with the bigger one, so that they merged into one. They agreed that we would struggle with this truth, once we came along - we needed a bit of time to work out the details. So they came to a deal, an orbit whereby we would only ever see one side of their marriage. The two sides were of course very different.
But we have outfoxed them. We can see the dark side, which is very different. Craggy and mountainous, rather than smooth and lightly pitted. I can't see the moons as I write, because they're new. But it comforts me, in some odd way, to imagine that I came from the same place and will go back there.