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But if they are earlier than 1485, then they can’t be Richard’s remains.
The SUERC results showed a 95% probability that the bone samples dated from around AD1430-1460, and over in Oxford the results both came out at around AD1412-1449, again with a 95% confidence.
Radiocarbon dating of marine organisms can be out by up to several hundred years, and this effect can occur to a lesser degree in terrestrial life where sea-food forms part of the diet.
Such index fossils must be distinctive, globally distributed, and occupy a short time range to be useful.
How do scientists determine the age of fossils that have been under the surface of the earth for thousands of years?
Carbon dating is used to determine the age of biological artifacts up to 50,000 years old.