Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

In respect to the main question, hey, anything could happen. The Imperium could have been a little... bi-species curious...

sounds interesting Psienesis

Hmm, iifc, the original Rogue Trader back in the late 80s stated that the Abhumans were all the results of humans who got stranded on far flung worlds from humanity's earlier space expansion. During their times there, they either were mutated by warp radiations or genetically altered for better survival on certain worlds. Both Ogryns and Squats were the results of heavy gravity/extreme environment worlds, while Ratlings and Beastmen were more likely caused by warp radiations. But, hey, its been a long time since I've read that book..

The only reason 'Abhuman' exists is because saying 'Mutants' is particularly frowned upon by the establishment. Ogryns are a combination of the gravity and warp radiation, but again, no one really wants to say 'Mutant' out loud or those funny people in the Victorian-Era garb might sweep you out of existance.