A while ago (about 2016) I read an illustrated pdf about human colonization of outer space. First they fought, Martians with Earthers, then they had some kind of homo novus and, afterwards, they started colonizing space and diverging. Much later, they found some aliens, who subjugated them and transformed them into near-animals, some of them with sentience, but many without. Some were mutated into giraffe-like animals, grazing, and they had sentience at first but they lost it. Others were mutated into cell-like beings that had to exchange nutrients among themselves, etc.
The pdf went on with many subspecies. I think it was self-published on the internet, not ever printed.