Dating pulse

Starting from the pulse around the years 1963 (see figure), atmospheric radiocarbon decreased with 1% a year.C has not actually disappeared, it has simply moved out of the atmosphere.

However, it has been confirmed that atmospheric C concentration with the date.

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This continuous decrease permits scientists to determine among others the age of deceased people and allows to study cell activity in tissues.

By measuring the amount of C left in the dead organism permits to calculate how long ago it died.

Scientists can cross-check this ratio with knowledge of the half-life of carbon 14 to determine the era a given fossil comes from.