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They used pottery and other materials in sites to date 'relatively'.

They thought that sites which had the same kinds of pots and tools would be the same age.

We know that it is older than Christendom, but whether by a couple of years or a couple of centuries, or even by more than a millenium, we can do no more than guess." [Rasmus Nyerup, (Danish antiquarian), 1802 (in Trigger, 19)].

The person who wrote these words lived in the 1800s, many years before archaeologists could accurately date materials from archaeological sites using scientific methods.

Welcome to the K12 section of the Radiocarbon WEBinfo site.

The aim here is to provide clear, understandable information relating to radiocarbon dating for the benefit of K12 students, as well as lay people who are not requiring detailed information about the method of radiocarbon dating itself.

Because carbon is very common on Earth, there are alot of different types of material which can be dated by scientists.

In Nyerup's time, archaeologists could date the past only by using recorded histories, which in Europe were based mainly on the Egyptian calendar.

The job of a radiocarbon laboratory is to measure the remaining amounts of radiocarbon in a carbon sample.

This is very difficult and requires a lot of careful work to produce reliable dates.

It is called 'radio'-carbon, because it is 'radioactive'.

This means that its atomic structure is not stable and there is an uneasy relationship between the particles in the nucleus of the atom itself.

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