There is also the possibility that humans had a broader “toolkit” and vocabulary, and between better tools and communication, out competed Neandertals.
The lack of both Y chromosomes and mitrochondrial DNA from Neandertals also suggests DNA contributions were one way - Neandertals raping human women (maybe due to our better neoteny), which then gives humans a reason to kill Neandertals. Given a small population, they would allow the hybrid females to live as breeding stock but kill most of the hybrid males. Those females were healthy and disease resistant, spreading the Neandertal DNA to the next generation of humans.
End result - the genetic results we see as well as lack of Neandertals.
Interesting speculation.
Or...both Neanderthal and h. sapien males were more attracted to h. sapiens women and nobody wanted to bed any Neanderthal woman with faces that could stop a mammoth in its tracks.
Or...both Neanderthal and h. sapien males were more attracted to h. sapiens women and nobody wanted to bed any Neanderthal woman with faces that could stop a mammoth in its tracks.
....and maybe h. sapien females found the extra manly Neanderthal men extra hot, fur and all.