What makes radiocarbon dating work dating pottery shards

Here on Earth, Carbon is found in the atmosphere, the soil, the oceans, and in every living creature. C-12, so-named because it has an atomic weight of 12 – is the most common isotope, but it is by no means the only one.

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At an ar­chaeological dig, a piece of wooden tool is unearthed and the archaeologist finds it to be 5,000 years old. The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.

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