Skip to comments.DNA From 12,000-Year-Old Skeleton Helps Answer the Question: Who Were the First Americans?
Posted on 05/16/2014 5:30:54 AM PDT by Renfield
ome 12,000 years ago, a teenage girl took a walk in whats now the Yucatan Peninsula and fell 190 feet into a deep pit, breaking her pelvis and likely killing her instantly. Over time, the pitpart of an elaborate limestone cave systembecame a watery grave as the most recent ice age ended, glaciers melted and sea levels rose.
In 2007, cave divers happened upon her remarkably preserved remains, which form the oldest, most complete and genetically intact human skeleton in the New World. Her bones, according to new research published in Science, hold the key to a question that has long plagued scientists: Who were the first Americans?
Prevailing ideas point to all Native Americans descending from ancient Siberians who moved across the Beringia land bridge between Asia and North America between 26,000 and 18,000 years ago. As time wore on, the thinking goes, these people spread southward and gave rise to the Native American populations encountered by European settlers centuries ago....
(Excerpt) Read more at smithsonianmag.com ...
Just think of it .glaciers during the last Ice Age extended to the Yucatan in Central America and then “global warming” occurred to melt all that ice .and there was only a fraction of the human population we now have with no fossil fuel emissions. Amazing.
So-called “scientists” today should be ashamed for trying to foist the hoax of anthropological global warming on us. Though they have the drug-addled and poorly educated youth bamboozled, It is outrageous that they consider adults as so gullible.
Sacrifice. I don’t know why they make it out to be an accident. I guess to preserver the meme that the original humans in the Yucatan was wonderful benevolent people. They actually were into human sacrifice and self mutilation. The kings pierced their privates to get blood for their gods.
Bull. God created the Earth 6,000 years ago. IT'S A FACT!!! More Satan Obammy lies. Why do you people hate God? What are you afraid of? Repent. Jesus Christ loves you but if you doubt Him, He will cast you into a lake of fire for all eternity.
“You know, if I were a single man, I might ask that mummy out. That’s a good-looking mummy” Bill Clinton, looking at “Juanita,” a newly discovered . . . .
Wouldn’t every bit of carbon 14 be gone after, say, 10000 years?
How can they state with certainty that this skeleton is 12000 years old?
Sure, why not? She’s probably more attractive than the wife.
The half life of carbon 14 is 5730 years. Given that, after 12000 years, it’s a pretty easy calculation to determine the amount of C-14 left in the sample. Doing so gives about 23% of the original C-14, which is quite easily measurable.
In any case, C-14 is not the only radioisotope used for dating, but in this case it’s the likely method used.
Thanks for the answer.
Not to be ungrateful, but the handwave
“of the original C-14”
always amuses me.
The upper limit for C-14 dating is generally accepted to be around 50,000 years.
Actually, the glaciers didn’t extend anywhere near the Yucatan. What he said in the article is that when they melted after the “ice age”, sea level rose and covered this pit.
They’re called Cenotes which means “well of sacrifice.” Google it.
It’s not exactly handwaving; it’s (unlike AGW) fairly well understood science. The abundance of C14 relative to that of C12 is very well measured today. We have no reason to believe that this abundance was much different in the past. If it was, that would likely indicate significant differences in the past in the laws governing nuclear processes. That would be very fundamental differences in areas that are very well understood. It’s possible that this is the case, but if it were, there would be many observable consequences in areas independent of the C-14 abundance. IOW, you can’t just muck around with the C14 abundance without also changing a lot of other stuff. We would certainly notice such changes. Given the nature of science, then, we choose the simplest explanation, which is that the laws of nuclear physics have remained constant and that the relative abundance of C14 hasn’t changed.
Given those conclusions, it’s pretty easy to measure the abundance of C14 in a specimin such as this and compare it to the current C14 abundance. In this case, the abundance in the specimin is about 23% of that currently observed, so this leads directly to the 12,000 year proposed age.
It is true that this is not proven in the strict logical/philosophical sense. However, that’s not a reason to criticize; nothing in science is ever proven in that sense. All the evidence we have, though, leads to the conclusion that this specimin is 12,000 years old, that decay rates don’t change over time, and that isotopic abundances are fairly constant over time. If you disagree, then go out and find evidence to the contrary. If you do so, scientists will listen. If not, the scientific community will not take your objections seriously.
Don't text while walking!
That had to be sarcasm. Either that or one truly ignorant person.
So much wrong with that comment:
1. Believing that the earth is older than 6,000 years old hardly makes one an atheist. I would venture to guess that the majority of Christians are not young earth creationists.
2. Trying to scientifically figure out what has happened on earth in the past is hardly tantamount to “hating God”. Why would God give us the intelligence to persue scientific questions and the curiosity to do so if He didn’t want and expect us to use them? The Bible is not a science text. It may be inerrant, but it tells us what we need to know to get along with each other and create a civilized society. I don’t believe it gives a full and complete account of all possible scientific questions. That’s not its purpose. Besides, God helps those who help themselves, right? Isn’t it better for us to find out these answers ourselves rather than rely solely on God to spoon feed us?
3. The essential message of Jesus was that we are all sinners and can all be forgiven because of His sacrifice. Even those who doubt can be redeemed. This commenter is way out of line to presume to know what will happen to anyone who doubts Jesus. Perhaps Jesus will work to overcome their doubt. Perhaps they will be forgiven. This commenter sounds VERY judgemental for a purported Christian.
It is outrageous that many adults ARE so gullible.