Just another weird thing that occured to me (no, I mean it occured to me that I should ask about it!):
If you could yourself deeply, you essentially have two wounds, don’t you, one on each side of the cut. These two heal – they become one again.
Now, if I sliced off some of my flesh on the left arm, and some on the right, put the wounds together, and waited REAL long, would they become one? Would my arms grow together?
If not, why not?
If you could keep your arms from coming apart and not moving for long enough, I would venture to say yes. When people have bad burns on their hands, it is imperative that the doctors seperate the fingers so that they do not grow together.
As I recall, this was experimented with in concentration camps in WW2. Identical twins were sewn together, but all that happened was the wounds became gangrenous and the twins died. So I’d guess no, even if the twins were joined when born.