This is short fiction (most probably a short story, or just possibly barely making it to novelette) I read more than 20 years ago.
They find in the Arctic frozen remains of a primate that seems to be roughly as ancient as some of the australopithecus, so they call it (if I remember correctly) "borealopithecus" but I googled this word and got nothing.
Anyway they manage to clone (I think) a living organism from these remains and he (he is a male) is left to survive in an arctic environment, with a herd of reindeers that he learns to semi-domesticate. He manages not just to survive, but make elaborate clothes, tools, various artifacts including a sleigh and at the end, in his red clothes (dyed with the juice of arctic berries, I think) with white trimmings, he lifts up with his sleigh into the sky, taking a big bag full of the various artifacts he had made, pulled up by seven reindeers !
The story itself is of course a joke, but my request is serious. I did read this story and I'd really love to find out whether I can find it again. It was in a collection of F&SF, even if it is also a joke.
Cloning a living creature from frozen bones is SF, isnt'it ? And the end is Fantasy.