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How many weeks' holiday a year are there?
getting accutane To determine the age of the materials, the team measured the amount of radioactive carbon-14 in each sample and used the known decay rate of carbon-14 to calculate an age. Such calculations are not exact and produce results that represent a window of time, usually ranging between 200 to 300 years or so. By placing the dates in a computer model, the team was able to identify distinct periods of overlap in artifacts from the same time period, producing narrower and more precise age windows.
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