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The uncertainty of science: New research suggests the radioisotope dating that scientists use has been overestimating the age of many samples.
The article does not indicate if this overestimate applies to all radioisotope dating or just to the strontium-86/rubidium-87 dating methods mentioned. Nor does the article detail how much of an overestimate the scientists have measured. Depending on these factors the difference — and its influence on scientific results — could be relatively small, or quite large.