Fossil dating problems

The isochron techniques are partly based on this principle.

One question that sometimes arises here is how can scientists assume that rates of radioactivity have been constant over the great time spans involved.The differences actually found in the scientific literature are usually close to the margin of error, usually a few percent, not orders of magnitude!Vast amounts of data overwhelmingly favor an old Earth.In a related article on geologic ages (Ages), we presented a chart with the various geologic eras and their ages.In a separate article (Radiometric dating), we sketched in some technical detail how these dates are calculated using radiometric dating techniques.

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