I'm shocked.
Posted on 05/08/2011 7:55:52 AM PDT by wildbill
A new study of DNA suggests North America was originally populated by just a few dozen people who crossed a land bridge from Asia during the last Ice Age.
About 14,000 years ago, humans crossed the Bering land bridge from Siberia to North America, most experts agree. But just how many intrepid explorers were involved in spawning subsequent populations has not been known.
"The estimated effective size of the founding population for the New World is about 70 individuals," said Jody Hey, a professor of genetics at Rutgers University.
(Excerpt) Read more at livescience.com ...
I'm shocked.
“Effective” size is the equivalent to a founding population. But that’s 70 breeding adults, plus elders, children, and their descendants. A closely related band of hundreds would still have the “effective” size of 70 unrelated people.
A thousand people isolated in Siberia for a few thousand years intermarrying would also have the same limited genetic variability.
The death rate at childbirth could not have been that high. Prior to hospitals, the death rate was 5-10% per childbirth. It was only in the 1800s when women were in hospitals with doctors coming in from dissecting corpses and spreading “childbirth fever” that the death rate for child birth was 30-50% - and the rate was much lower for women using midwives at home.
Si, pero dos tiene llantas malas y el otro necesita un jumper cable.
You’re right. There were 71—but one was gay and didn’t leave any progeny.
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hehehe loin springing.....
And two of those settled W.Va.
Not at all. It could easily be done.
Back in high school I and a fellow computer geek friend of mine set out to show, mathematically, that it was impossible for Noah and his passengers to have possibly reproduced sufficiently to have enough progeny to end up with the then total world population.
Our formula was fairly complex, and intentionally very conservative. We tried to allow for lower-end birth rates, low child-survival rates, young death rates, generational wars and epidemics reducing population... everything we could think of. As it turned out... even with our most conservative formulas, it turned out that the total world population might still have been several times what it is now. We had to conclude that it was entirely reasonable that Noah and his progeny could have produced the current world's population, easily.
Do you have a web source for this tree?
Well, yeah.... Even the Old Testament says, "The days of our years are threescore years and ten; and if by reason of strength they be fourscore years..." (Psalm 90:10)
If that’s the case, then the Indian population of North America at the time of Columbus would have been approx. 43 billion people (assuming an average annual growth rate of 1.5%).
One of the comments to the “music” video:
“i have to admit, his dancing is freakin awesome! i wish we still had music like this pouring out into our society.”
Dancing? It looked to me like he swallowed a ferret and it was chewing its way out. At least it was appropriate to the banality of the “music” and the idiocy of the “lyrics.”
You certainly widened the scope of your formula to allow for all sorts of Malthusian maladies.
But you appear to have missed one of the most important impediments to the uncontrolled and dangerous geometric progression Malthusian maladies in N. America appears to have been missed.
I refer of course to the stampedes of huge herds of mammoths, stretching as far as the eye could see, wherein thousands of tiny tykes would be stomped to death under the thunding hooves. Sad, of course, but indisputably true.
By the way, some scientists are preparing to clone these massive marauding monsters into our peaceful world even as we debate the 70 DNA strains. Remember, the plan of the Liberals to disarm us so we won’t have guns to defend ourselves from cloned mammoths. I have tried to bring this warning to all our Freepers for years.
Verily I cry woe! and Whoa! For it won’t be long before the Great Plains become the Great Pains for modern citizens who don’t know one end of a fluted Clovis point from a pointed flute.
But I digress...
It almost has the ring of a logical fallacy to it.
Some of the Clovis people just can’t let go. ;>)
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