Actually, a new species only happens when its offspring can no longer reproduce with the old species. This was observed to happen a few decades ago in the US.
There were three breeds of wild bird, one western, one central US, and one eastern. The western and eastern birds could reproduce with the central breed, but western and eastern breeds could not reproduce with each other. And the central US breed was dying out. So technically, once it was extinct, the western and eastern breeds would become two different species.
The only known real mutation of humans to happen in recorded history was in one family in Europe, whose parents had five or six boys, who became known as “the hedgehog men”, because they had very rough skin from their knees to their navel, like hedgehog skin. For the time, about 400 years ago, they were seen as smarter, stronger and faster than were typical people.
Unfortunately for them they could not easily mate. Had they tried they could have caused significant harm to the woman. So they died out. Such is natural selection.
my dear FReeper. thanks. i’ve enjoyed hearing you and i’ve learned something from you. i’m going to move on, now. my dearest wish for you, is that God continue to bless you. that He, renew your sight and enable you see with clarity and keen insight. Peace to you and good night.