Can only humans be mutants in Marvel?

In the early 2000's there was an X-Men series called X-Men Unlimited. I remember an issue where a dying mutant was detected, I think by Professor X using Cerebro. Hank McCoy who had recently mutated into a cat-like creature, went to investigate. H... read more

Mutants in Marvel is a tricky thing because there is a “mutant” race. Humans who are born with the “X-Gene”. However, in the comics the term “mutant” is also frequently used to describe anyone of any race who happens to be different from the norm. read more

I think the marvel universe would only have a stronger skepticism towards mutants and superheroes if Superman was in the marvel universe. The entire premise behind Civil War is that mutants and super people have too much power and are a danger to the common people, weather they mean to be or not. read more

Human mutants are considered to be of the subspecies Homo sapiens superior or simply Homo superior, an evolutionary progeny of Homo sapiens, and are considered the next stage in human evolution, although whether this is true or not is a subject of much debate in the Marvel Universe. read more