This is a great article, Tom. Neanderthals were very widespread; fossil remains of them have been found not only in Europe, but also in the Middle East and Central Asia. So they may have bred with quite a variety of prehistoric peoples. An interesting point to consider is this: There may have been some other stone age peoples that we don't know about yet.
I personally think that those stone age peoples had spoken languages. Of course, when tribes who did not know each other's languages first met, they must have communicated by sign language. However, some may have learned languages of tribes other than their own. If two tribes lived in close proximity to each other and cooperated in some activities (hunting, food gathering, etc.) they may have learned the languages of each other.
--- In email@example.com, Tom Johnson <fadingshadows40@...> wrote:
> Here is a fantastic article on the crossbreeding of early humans with other
> people of mystery genomes