Since the 1960s, scientists have started accounting for the variations by calibrating the clock against the known ages of tree rings.
Offering in 1952 his new radiocarbon method for calculating the age of organic material (the time interval since the plant or the animal died), W. Libby clearly saw the limitations of the method and the conditions under which his theoretical figures would be valid: A.
Radiocarbon is not used to date the age of rocks or to determine the age of the earth.
Other radiometric dating methods such as potassium-argon or rubidium-strontium are used for such purposes by those who believe that the earth is billions of years old.
Carbon dating is used to work out the age of organic material — in effect, any living thing.
The technique hinges on carbon-14, a radioactive isotope of the element that, unlike other more stable forms of carbon, decays away at a steady rate.
denying our humanity, our wills, our souls, ..to say, 'oh, it is man made, it is...