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Being knowledgeable about such a widespread dating method is essential for Christians to address opposing arguments and critics. Natural radioactivity was discovered in 1896 by the French physicist Henri Becquerel.

A decade later, American chemist Bertram Boltwood suggested that lead was a disintegration product of uranium and could be used as an internal clock for dating rocks.

Unlike people, you can’t really guess the age of a rock from looking at it.

Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old.

Each original isotope, called the parent, gradually decays to form a new isotope, called the daughter.

Each isotope is identified with what is called a ‘mass number’.

This technique works well for materials up to around 50,000 years old.

Each radioactive isotope decays by a fixed amount, and this amount is called the half-life.

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