Changes again
Last year, researchers at Purdue and Stanford published evidence that radio decay rates are not as constant as geochronologists have thought. Dating the earth through radiometric methods may therefore be even less simple than previously believed.
Dec 13, 2006, a magnificent solar flare flung radiation and solar particles toward Earth. Purdue nuclear engineer Jere Jenkins had been measuring the decay rate of manganese-54, and he noticed that a day and a half before the flare, the decay rate of Mn-54 started to drop a little. That was interesting.
Ephraim Fischbach, a physics professor at Purdue, had already found a variety of disagreements on decay rates in the literature. Fischbach had been looking for a good way to generate truly random numbers and had turned to radioactive isotopes. Chunks of radioactive elements might decay at steady rates, but the individual atoms within them decay unpredictably. Fischbach could therefore use the randomly timed ticks of a Geiger counter to generate lists of numbers.
As he did more research, though, Fischbach found variations in the published decay rates of certain isotopes. He also found that the decay rates of silicon-32 and radium-226 showed seasonal variation, according to data collected at Brookhaven National Laboratory on Long Island and the Federal Physical and Technical Institute in Germany. When the decay rate of Jenkins' Mn-54 dropped during the solar flare, Jenkins and Fischbach stood up straighter and paid attention.
"Everyone thought it must be due to experimental mistakes, because we're all brought up to believe that decay rates are constant," Peter Sturrock, Stanford professor emeritus of applied physics, commented on the issue.
Discord Dating:
There is reason for skepticism. Age dating methods do not always produce correlating results. [See links below.] Wood buried in igneous rock in Queensland Australia has been dated to 40,000 years, while the basalt around it dated to 45 million years. Both dating subjects should have given the same date, since the igneous rock was formed at the same time the wood was buried (and the wood still had plenty of carbon-14 in it). Dalrymple himself reported "excess argon-36" in three out of 26 lava flows in his article, "40Ar/36Ar Analyses Of Historic Lava Flows". The excess argon gives negative age-dates because of too much daughter product. Since it is impossible to date a rock that hasn't formed yet, there was a good indication that the Ar-36 wasn't coming from just the parent material.
Geologist Steve Austin describes discordant age dates in his article "Excessively Old 'Ages' For Grand Canyon Lava Flows." He tested different layers of the Grand Canyon and got age dates for older layers that tested younger than the layers above them. The science of geochronology has a lot of room for error.
Ultimately, the researchers who age-dated the meteorites on Dalrymple's lists assumed the rocks were billions of years old, they used methods that fit their presuppositions, and they got results that fit their presuppositions. Would they have gotten younger chondrite ages if they had used different dating methods?
It is always dangerous to come to science with assumptions, regardless of one's position. Scientists have long assumed that radioisotope decay rates are constants, but the evidence now indicates that decay rates vary over time. If, as Jenkins and Fischbach have argued, solar neutrinos zipped through space, effecting Mn-54's decay rates in a Purdue laboratory, then those tiny energetic particles certainly have had the capacity to affect the decay rates of trace nuclides in chunks of rock floating out in space.
Are the observations of Jenkins and Fischbach minor fluctuations, or have decay rates actually slowed down over time? Has the very speed of light slowed through the years, and how might that have affected decay rates? Are there truly any physical constants in the universe?
These are the questions that astrophysicists and geochronologists can have a fun time trying to answer. In the meanwhile, we'll keep on watch for further developments. The variability of decay rates has massive implications - for medicine, for technology, and for mankind's longing to produce a birth certificate for the Earth.
I found your source:
Solar Flares, Radioactive Decay, and The Age of the Earth - eNews for May 03, 2011
The article mentions that the speed of light may have slowed down over time, but can't back this claim up.
RickG and I have pounded this issue to death already. According to the article,
some radioactive isotopes changed their decay rates (and they did so for a reason - if they fluctuated randomly, that would make results unreliable; if they changed during certain events, as seems to be the case, you can cross-reference them with those events to increase the accuracy of your calculations). The article doesn't say how much they changed, but as far as I remember, they did so by less than
one percent. This means that the error margin would increase by less than a percent when dating with them. In short, the dinosaurs didn't die 65 millions years ago, but 64,35 million years ago at worst - still enough to disprove young earth creation.
These isotopes aren't used for dating, anyhow. Nowhere in the article does it state that C14 decay rates changed, and that's the primary isotope used in dating.
In order not to disprove young earth creation, radiocarbodating would have to be 10000 times faster in the past, which would mean that it would emit 10000 times more energy, which would mean that the earth would boil away.
Let us summarize our findings, shall we?
Radioactive isotopes that aren't used for dating changed their decay rates by less than a percent
If those radioactive isotopes
were used for dating, the error margin would increase by less than a percent.
If radioactive isotopes decayed 10000 times faster in the past, that would mean the young earth hypothesis could be right - but it would also mean the young earth would explode.
Another thing. Scientists already account for things that could throw off radioacarbodating.
One last thing. Before you make any mention of the daughter isotope being already present in the sample, you should probably think
once about what the daughter isotope
is, anyway. As far as I can see, the daughter isotope of C14 is nitrogen 14.
In short, for this objection to make sense, dinosaurs must have eaten more nitrogen than other animals! What's even more interesting is that there would be a correlation between nitrogen eating and going extinct...
So I guess dinosaurs must've gone extinct because they tried to eat air, or what?
EDIT:
This whole bit about dinosaurs starving to death because they ate nitrogen is
not a scientific explanation for why they went extinct.
It's an argumentum ad absurdum. I intended to show you how ridiculous your argumentation was by presenting the conclusion of it to you.
I apologize for confusing certain people.
With
certain people, I mean Doveaman.