Originally posted by karajorma
I very much doubt that evolution will ever throw up non-coporeal beings from humans. It's unlikely in the extreme.
Now Humans meddling with forces that are beyond current thought and deliberately or even accidently turning themselves incorporeal is another matter. 
As for the shivans evolving. Well the thing to remember is that evolution only messes with things that aren't well adapted to their surroundings. Crocodiles have been around since the Dinosaurs times with very little in the way of change. Sharks have been around even longer.
If the shivans are living in space for billions of years then they are unlikely to have had much of a selection pressure that would cause evolution.
Secondly evolution depends on mutation. If the Shivans mercilessly exterminate any shivan that isn't pure then they could very easily survive for all time without any change.
I think it's unlikely that the shivans would have existed unchanging for billions of years but if you say that their culture hasn't changed in that long then there is no good reason why their bodies would.
Right, especially since most of you are assuming that there are any factors that affect the evolution of the Shivans in the first place. Living in space, there are not very many abiotic factors to depend on. Evolution comes with natural selection. But when nature isn't even there in the first place, you've got no evolution. The Shivans, remember, were a produced species (at least in Buu's theory). The only thing that could be farfetched is the 800-billion year thing, but even that has some substance to it.
Another thing: When you think about evolution and a species, it's quite impossible for a species to evolve into ethereal. Think about it. A species, upon first existence, is either corpereal or ethereal. Evolution cannot in any way meddle with the two different realities. Think of corpereal and ethereal as two different phases of reality. In ours, time and evolution have effect, and we have four dimensions. I'm not sure about ethereal physics though (I'm only fifteen, still got lots to learn
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Shivan evolution would then have to depend on mutation, as Karajorma introduced. The Shivans being a produced, and flawless, race, there wouldn't be any other "different" Shivans that would survive. And on the same note, if the Shivans are produced, would they even have mutations? We're assuming that they have DNA like we do, but do they? Here on earth, every single being has something in common: we all have DNA. But would the Shivans have it?
Wooh...my two cents
