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The results showed that Ötzi died over 5000 years ago, sometime between 33 BC. Uranium has a very long half-life and so by measuring how much uranium is left in a rock its approximate age can be worked out.

The work of geologists is to tell the true story of Earth's history—more precisely, a story of Earth's history that is ever more true.

It is that insight, first expressed in 1785, that made James Hutton the father of geology.

So we knew about "deep time," but exploring it was frustrating.

When they die no new carbon-14 is taken in by the dead organism.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.Radioactivity was discovered in 1896 by French physicist Henri Becquerel.By 1907 study of the decay products of uranium (lead and intermediate radioactive elements that decay to lead) demonstrated to B. Boltwood that the lead/uranium ratio in uranium minerals increased with geologic age and might provide a geological dating tool.




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But only another Virgo understands what it takes to stay 'pure' and what drives the Virgin to stay "whole unto themselves." This can be a perfect love, as long as the Virgin realizes that perfecting the self in love, is a worthy direction, but not a destination.


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I entered the church that evening with God’s peace inspiring my steps.


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A Different Focus The Orthodox observance of Christmas contrasts considerably from Western customs.