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This week, Cherry Lewis of the University of Bristol presented a talk about the history of dating the Earth as part of the BA Festival of Science in York, England.

Before so-called radiometric dating, Earth's age was anybody's guess.

Meanwhile, Arthur Holmes (1890-1964) was finishing up a geology degree at the Imperial College of Science in London where he developed the technique of dating rocks using the uranium-lead method.

By applying the technique to his oldest rock, Holmes proposed that the Earth was at least 1.6 billion years old.

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Kelvin defended this calculation throughout his life, even disputing Darwin's explanations of evolution as impossible in that time period.

Mr Miller sent the sample to the University of Georgia, Center for Applied Isotope Studies, for this purpose.

The sample was divided at the lab into two fractions with the “bulk” or collagen break down products yielding an age of 33,570 ± 120 years and the carbonate fraction of bone bioapatite yielding an age of 41,010 ± 220 years [UGAMS-11752 & 11752a].

Evolution & Ecology " (see its HOME PAGE .) The result is that some areas, such as the glossary are shared.

Widgets Human evolution from an ancestral primate species is not a vague hypothesis, but a historical fact.


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