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04 Feb

A useful application of half-lives is radioactive dating.

This has to do with figuring out the age of ancient things.

(The principle of superposition was recognized as early as 1669 by Steno.) Reverend Benjamin Richardson and Reverend Joseph Townsend were a couple of early geologists involved in this work. Obviously, even Lyell was not pushing evolution at the time.

By 1830 Lyell's famous textbook, Principles of Geology, came out. Such was the age of the great creationist geologists!

Knowing about half-lives is important because it enables you to determine when a sample of radioactive material is safe to handle.

Then the paleontologists use the geologists' dates as evidence for the age of the fossils! The relative order of the strata was first determined by the principles of stratification. Beagle, a very strong Bible believer, made it a point to have a copy of Lyell's book for the ship's library.

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Being ancient, the C-14 content has long since decayed away and that makes it useful in "zeroing" laboratory instruments. Hovind would take the trouble to do a little reading from something other than creationist publications he would not make such an outrageous statement.

It's just one of the tricks that have been used to make the work a little more precise. I believe he has confused the use of index fossils with evolution.