Bomb#20
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That fits. If the Borean hypothesis holds up, it specifically implies the languages of Mongols and Apaches ARE related*, since it would classify Genghis Khan as a Nostratic speaker and Geronimo as Dene-Caucasian. That would make their common agnatic ancestor a good candidate for a speaker of proto-Borean; and proto-Borean being spoken 15,000 years ago seems more plausible than 50,000.These examples suggest to me that macro-families like Eurasiatic or Dene-Caucasian (or even perhaps Borean) may have originated rather recently, as Mr. Bomb points out:
...
There is a HUGE amount of information available from Y-chromosome haplogroups. For example, although the C haplogroup may have moved through India and into East Asia 55,000 years ago (or thereabouts), the common agnatic ancestor of Genghis the Mongol Khan and Geronimo the Apache lived about 15,000 years ago. (In fact the languages of Mongols and Apaches are NOT related; I just mention this recency to depict the recency of some common ancestries.)
(* Of course all languages are related. We're here using "related" as a shorthand for something like "related through a specific suspected chain of descent".)