Dating different people

However, on the whole, he thought that these sources were not adequate to account for anything more than a small faction of the heat lost by the Earth.Based on these assumptions he at first suggested an age of the Earth of between 100 Ma and 500 Ma.Of course, this was a close as Kelvin ever came to publicly recanting his position.Later, after radioactivity had been proven to be a significant source of the Earth's internal heat, he did privately admit that he might have been in error.What is especially telling about this whole story is the conclusion of the absolute truth of the conclusion based on premises that are weak, or at least not adequately demonstrated.Chamberlain (1899) pointed out that Kelvin's calculations were only as good as the assumptions on which they were based.

If you are extremely busy and do not have time to have a cup of coffee with every person you liked, it is the only way out.This estimate was actually reduced over his lifetime to between 20 Ma and 40 Ma and eventually to less than 10 Ma. Perry, in particular, a noted physicists and former assistant to Kelvin, showed that cooling calculations using different but equally likely assumptions and data resulted in ages for the Earth of as much as 29 Ga.Of course, later scientists, like John Perry and T. After this came to light, Kelvin admitted that he might just as well have set his original upper limit on the age of the Earth at 4,000 Ma instead of 400 Ma.Finally in 1976, it was discovered that the earth is "really" 4.6 billion years old… The answer of 25 million years deduced by Kelvin was not received favorably by geologists.Both the physical geologists and paleontologists could point to evidence that much more time was needed to produce what they saw in the stratigraphic and fossil records.

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