@FBM,
Do editors ever pause to examine these things, I wonder?
Quote: A 2006 study suggests this tolerance for lactose was still developing as early as 3,000 years ago in East Africa. [Hmmm, OK, now what?]
... when we began domesticating cows, sheep and goats, being able to drink milk became a nutritionally advantageous quality, and people with the genetic mutation that allowed them to digest lactose were better able to propagate their genes. [Ah, ha! An adaptive advantage, eh!?]
That genetic mutation for digesting milk is now carried by more than 95 percent of Northern European descendants.
Lemme see if I got this straight, eh? As recently as 3000 years ago, virtually the whole human population, which had survived and thrived for tens of thousands of years without being able to digest milk (after being weaned, anyway), was doing fine. But since that time, pretty much all those who couldn't digest milk have failed to successfully propagate their genes and ONLY those who could digest milk have managed to "survive."
Anyone actually "do the math" on this, I wonder? I mean, just for example, suppose there were a million humans. Then ONE human experienced a mutation and could then digest cow's milk (which the other million had domesticated--probably just to benefit this one individual with the mutation, eh?).
This individual presumably mated with a substandard, non-milk-digesting human. So did the other million, of course. But the offspring of this one guy overcame ALL the offspring of the million others when it came to propagating his "special" genes, and all in a mere 3000 years, too, that the idea?