I was thinking the other day, in the Marvel Universe you have humanity/homo sapiens.
Humanity is arguably evolving into mutants/homo sapien superior. But then you throw into the mix the Eternals - an offshoot of homo sapiens...but how would you categorise them? Are they still humans?
Same question for off-shoots of mutants, such as the Children of the Vault - are they still considered mutants? What about the Neo? And don't even get me started on what Vargas was meant to be!
I mean, how many off-shoots of humanity and mutants are there? And would these off-shoots still be considered sub-species of humanitys/mutants or an entirely different species altogether?