Science talks about fission and fusion. It also talks about the human body being made up of atoms, molecules and nano particles. I don't know if research has been done about what happens when one dies, but logically the answer seems to fit into the fission and fusion theory.
Every day, every moment, there is some fission and fusion going on in the body. If the birth denotes fusion, death would denote fission. I would assume that the molecules that came together to create the particular thing, animal, person, etc., would separate and find new hosts to continue their rise in consciousness.
If the 'molecules' that denoted one thing now separates and resides in multiple things, would that be said as one soul being divided into multiple persons or 'things'? I wonder if that also creates the pull of Ketu - trying to bridge the separation that is experienced, until one accepts the separation and allows it to exist, while accepting a new network of molecules to work with and unite with denoted by moving towards Rahu.
Yes, that is all that happens. There is ONE SOUL. Then there are countless personalities. Go, and all of US. The ego is the IDEA of separate existence, the One Soul takes a form and in that has Ego, the idea that its separate and even the idea that it has a separate soul. The personality has a physical, astral and casual body. Beyond that, is the One Soul. What the ego likes to call soul is either the astral body or the casual body, depending on how one wants to view that idea of soul. But it's not soul, it's just an energetic body or a thought body. It's just another body and just like the physical body has its gifts and abilities, these bodies have their gifts and abilities. What we call psychic abilities are the abilities of the astral body and what we call miracles or Siddhis are the gifts of the casual body. But none of these are Soul.
So the question really is, does the casual body or the astral body take on multiple physical bodies at the same time? Well, I don't think the astral body can do that, but the casual body can. It's one of the siddhis, the ability to be in different places at the same time with different bodies. But does this happen to people who are not consciously aware of their casual body and using it to perform miracles? Does it happen by that casual body taking birth in different bodies? I doubt it, because there is a link between the casual, astral and physical bodies that allows for us to learn and grow, and that would very much disturb that link.
A few years ago, I got a reading done by an astrologer who was an energy channeler/healer. She told me something along the lines of that I was a reincarnate of Julius Caesar "but there isn't only one person who is Julius Caesar, there's a lot." I didn't really make much of it at the time because my immediate thoughts were "why would Julius Caesar want to come back as me? I suck at everything" but, from reading through this thread I think she may have been referring to the energetic bodies mentioned above or some kind of quantum physics /superposition. I'm not very sure either way, but just thought I'd share my experience.
Interesting. I have noticed that astrologers who talk about such a split soul theory look closely the prenatal eclipse, maybe something else in addition.