It Seems To Me…
(A few overthinking moments on a lazy Saturday afternoon)

By observation of the Marvel / DC cinematic (and by extension, the comic book) universes, DNA replication and repair work quite differently there.

In our universe, mutations are rare.
Long term evolution to produce, let’s say, better night vision would require generations of shadow dwellers whose chances of reaching reproductive age depended on their ability to see in low light. Eventually you get good night vision.
Would likely take 15-20 generations (400 years of constant environmental pressure) in humans.

In these fictional universes, sudden external environmental change, instead of leading to death, would lead (in a significant number of humans) to real-time evolutionary adaptation and incorporation of characteristics of that external environmental change, into that adaptation

In those universes, DNA repair incorporates such things as spider DNA, super elasticity (in our world a deadly abnormality), spontaneous non-destructive combustion, hyper regeneration after near total cell eradication (a super pluripotent stem cell?), and the like.

At a subatomic level, the bonds that hold atoms and molecules are likely different, energetically speaking, letting things recombine nearly at random.

I wonder, in these worlds, are there spontaneous mutations after skiing accidents? Do third degree burns lead to asbestos skin?
Are there spontaneous non-heroic mutations all over?
Three eyes anyone?
Dog people?
Horns?

Just a thought.