An idea that Serp came with and although I know ASTA is opposed, I'll still show it in case it gets interrests.

As to justify how beings from one end of the galaxy to another are similar in look and anatomy to the point where they could put their dicks in their vaginas despite the billions of light years separating them, the idea of a common ancestor. An experiment for scientific purpose or the idea of a perfect pet/slave race, the humans to be engineered by the Kritans tens of thousands of years ago and seeded into space.

I plan on going full eldar for fan service's sake, but since I came to notice the spread of humans, this idea came up.

Thoughts?