Why is radioactive dating important when approximating the age of earth_
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There are many reasons why subjective age tells us so much about our health. By protecting us from our society's dismal view of ageing and giving us a more optimistic view of our future, this self-defence could, in turn, further explain some of the health benefits of feeling younger than you really are.
The other method is “Relative Dating” which gives an order of events without giving an exact age (1): typically artefact typology or the study of the sequence of the evolution of fossils. There are three carbon isotopes that occur as part of the Earth's natural processes; these are carbon-12, carbon-13 and carbon-14.