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To obtain a calendar age for the sample, this radiocarbon age needs to be compared against samples of known age by means of a calibration curve using a specially designed computer software application.This application uses a terrestrial calibration curve to calculate the calendar age.This allows corrections to be made on radiocarbon dates in order to produce more accurate dates.Radiocarbon dating, or carbon-14 dating, can be used to date material that had its origins in a living thing as long as the material contains carbon.

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The age of the plant or animal specimen containing carbon, such as wood, bones, plant remains, is determined by measuring the ratio of carbon-12 to carbon-14. Because of this relatively short half-life, carbon-14 can only be used to date specimens up to about 45,000 years old.Fiona is wearing an aspirator because of the carcinogenic properties of benzene.Special silica glass vials are used to contain the mixture of benzene and PBD.Amongst the artefacts that have been found are ancient moa bones.Some of these have been sent to the Waikato Radiocarbon Dating Laboratory for analysis.

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