Conjoined but not twins
The last page titled Weird Science got me thinking about comet 67P.
When ESA and the world first saw 67P we were amazed by its shape, maybe we'd see a potato shape or a pear or some kind of ball but two distinct lobes, it was fascinating.
ESA answered the question as to why 67P has this shape.
Two separate bodies conjoined with different alignments of the strata of ice and dust.
Their strata or layers aligned in differing orientations as these two distinct objects coalesced around a low pressure zone in space.
Meaning these two separate bodies came together gently enough to remain in tact, connect and stay connected.
Our moon model, an object uniquely collided with earth and spread expanding debris outward which coalesced into our moon and is still expanding outward at 4 inches per year.
This is not the norm matter fact its the only example of this in the solar system.
If two objects in space have mass they will attract. This is why 67P is composed of two distinct objects producing its shape.
Pluto and Charon have been in their orbital dance for a long long time and what they are doing is embracing as they come closer and closer seeking to join around that barycenter of low pressure in space.