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    Radiocarbon dating of fossils

    Isotopes of a particular element have the same number of protons in their nucleus, but different numbers of neutrons.This means that although they are very similar chemically, they have different masses.There are two techniques for dating in archaeological sites: relative and absolute dating.Relative dating stems from the idea that something is younger or older relative to something else.

    Writing of the European Upper Palaeolithic, Movius (1960) concluded that "time alone is the lens that can throw it into focus".

    Renfrew (1973) called it 'the radiocarbon revolution' in describing its impact upon the human sciences.

    Oakley (1979) suggested its development meant an almost complete re-writing of the evolution and cultural emergence of the human species.

    The total mass of the isotope is indicated by the numerical superscript.

    While the lighter isotopes C has decayed that what remains can no longer be measured. In 5,730 years half of the C in the atmosphere, and therefore in plants and animals, has not always been constant.

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