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Half life dating rocks

In a separate article (Radiometric dating), we sketched in some technical detail how these dates are calculated using radiometric dating techniques.

As we pointed out in these two articles, radiometric dates are based on known rates of radioactivity, a phenomenon that is rooted in fundamental laws of physics and follows simple mathematical formulas.

The latest high-tech equipment permits reliable results to be obtained even with microscopic samples.Among Rehabs.com's found odds of any other woman having the same physical measurements as Barbie, while considering those of both average American woman and anorexic women as well, the odds of finding a single woman with the same tall and thin neck as Barbie is one out of 4.3 billion.In a related article on geologic ages (Ages), we presented a chart with the various geologic eras and their ages.Radiometric dating is self-checking, because the data (after certain preliminary calculations are made) are fitted to a straight line (an "isochron") by means of standard linear regression methods of statistics.The slope of the line determines the date, and the closeness of fit is a measure of the statistical reliability of the resulting date.

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Then, even if circumstances change such that it no longer provides any survival or reproductive advantage, the behavior will still tend to be exhibited -- unless it becomes positively disadvantageous in the new environment.

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