”The largest ever study of global genetic variation in the human Y chromosome has uncovered the hidden history of men. Research published…in Nature Genetics reveals explosions in male population numbers in five continents, occurring at times between 55 thousand and four thousand years ago…
The earliest explosive increases of male numbers occurred 50,000–55,000 years ago, across Asia and Europe, and 15,000 years ago in the Americas. There were also later expansions in sub-Saharan Africa, Western Europe, South Asia and East Asia, at times between 4,000 and 8,000 years ago. The team believes the earlier population increases resulted from the first peopling by modern humans of vast continents, where plenty of resources were available.
The later expansions are more enigmatic…”
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Dr. Troglodyte