SAY WHAT!? THE LATEST GENETICS: Y CHROMOSOMAL ADAM MUCH OLDER THAN ...August 8, 2013
This one was shared with my by co-author and colleague Scott D deHart, and it is, as George Ann Hughes likes to say, a "whopper-doozie". When I saw the source - Faux news - my initial reaction was to roll my eyes, and wonder if anything really newsworthy would ever be reported on that network.
Well, spike that coffee with some Jack Daniels, light up the strongest menthol cigarette you can find, and brace yourself:
The article begins conventionally enough, reviewing the standard genetic-historical model:
"Researchers believe that modern humans left Africa between 60,000 and 200,000 years ago, and that the mother of all women likely emerged from East Africa. But beyond that, the details get fuzzy."
Ok, so far so good. And there's the usual stuff about Y-chromosomal Adam and Mitochondrial Eve, both living more or less at the same time and more or less coming out of East Africa somewhere:
"Bustamante and his colleagues assembled a much bigger piece of the puzzle by sequencing the entire genome of the Y chromosome for 69 men from seven global populations, from African San Bushmen to the Yakut of Siberia.
"By assuming a mutation rate anchored to archaeological events (such as the migration of people across the Bering Strait), the team concluded that all males in their global sample shared a single male ancestor in Africa roughly 125,000 to 156,000 years ago.
"In addition, mitochondrial DNA from the men, as well as similar samples from 24 women, revealed that all women on the planet trace back to a mitochondrial Eve, who lived in Africa between 99,000 and 148,000 years ago almost the same time period during which the Y-chromosome Adam lived."
But then comes the curve ball, and it is, once again, a whopper-doozie, for it seems