Hmmm, looking through the comments it looks very much like no one has read the article as the comments assume that the humans were Homo Sapiens. In fact the art

Hmmm, looking through the comments it looks very much like no one has read the article as the comments assume that the humans were Homo Sapiens. In fact the article speculates that the humans where either neanderthals or Denisovans. The earliest neanderthals date to 400k years ago. And the high arctic at the time of this find 130k years ago was pretty much one cold dry circumpolar ecosystem as ocean levels were much lower than today. Given all of this context it's not really insane to think this could have happened though of course more evidence is needed.