[brabel]

As the article says, humans interbred with Neanderthals to a degree that even today, Europeans have 2% of their genes coming from them.

It's possible that it was the "mixed" species that had the advantage over both the first human arrivals and the Neanderthals... with time, more human arrivals probably diluted the Neanderthals genes to the levels we see today.

[random314]

Alternatively, considering the mixed species weren't able to compete with the later human arrivals, or take over the human controlled areas in Africa - humans appear to have a distinct advantage over the mixed species.