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6 votes

How did Kelvin square his low estimate of the age of the sun with the geological evidence?

Kelvin did think that "uniform density with a fudge factor" was good enough. The more detailed considerations of the density profile were made by T.J.J. See in 1899, where he used the "...
Conifold's user avatar
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4 votes
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Which "experiments to solve geological questions" did Berend George Escher use?

This question highlighted the importance of complete and accurate citations. I spent a couple of hours researching the exact details of the two publications mentioned, after which it took on the order ...
njuffa's user avatar
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2 votes
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When was the term "plate tectonics" first used in geology?

D. Davies and D. P. McKenzie, "Seismic Travel-Time Residuals and Plates." Geophysical Journal International, Vol. 18, No. 1, Sep. 1969, pp. 51-63 (my bolding): The purpose of this paper is ...
njuffa's user avatar
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2 votes

How did 19th century scientists estimate the age of the Earth

In 1862, the physicist Kelvin published calculations that fixed the age of Earth at between 20 million and 400 million years.[18][19] He assumed that Earth had formed as a completely molten object, ...
drvrm's user avatar
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