Comment Re:Possession is nine-tenths of the law... (Score 1) 213
How do you know? Also, if that's true, was it ever molten, does it have a high density metal core?
Not sure how UnknownSoldier knows that. It certainly doesn't jive with what I've been hearing for the last 20 years since I was in school for physics. Current theory is that the proto Earth was hit by a proto Moon about the size of Mars. Part of the proto-Moon ejected from the collision, unfortunately, the heavy metal cores of both the proto-Earth and proto-Moon stayed with the Earth so the moon does not have a similar metal core and is mostly mantel material. Also, the proto-Moon ejection formed two bodies which re-collided fairly non-violently as things go with the other bit now smooshed onto the back side of the moon.