That Neanderthals and humans lived in the same region comes straight from the reference cited Neanderthal remains have been found less than  miles from Denisova Cave Artifacts in nearby caves and in Denisova itself suggest the presence of Upper Palaeolithicage people which might include modern humans  That being said it is still wrong to start the lede with the initial basis for deciding it was a new species before we lay the groundwork and the rest of your change still lacks a wellthoughtout structure and has the same grammatical problems  I get the impression we are dancing around the issue You say your problem is with specific words or phrases but then make major structural changes