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Radiocarbon dating uses the naturally occurring isotope Carbon-14 to approximate the age of organic materials. Often, archaeologists use graves and plant remains to date sites.

Since its conception by Willard Libby in 1949, it has been invaluable to the discipline.

­ ­You probably have seen or read news stories about fascinating ancient artifacts.

At an ar­chaeological dig, a piece of wooden tool is unearthed and the archaeologist finds it to be 5,000 years old.

In last Tuesday’s lecture, radiocarbon dating was covered briefly.

Most carbon consists of the isotopes carbon 12 and carbon 13, which are very stable.

Radio carbon dating determines the age of ancient objects by means of measuring the amount of carbon-14 there is left in an object.

A man called Willard F Libby pioneered it at the University of Chicago in the 50's. This is now the most widely used method of age estimation in the field of archaeology.

Carbon has different isotopes, which are usually not radioactive; C is the radioactive one, its half-life, or time it takes to radioactively decay to one half its original amount, is about 5,730 years.

The relatively short-lived C taken into organic matter is also slightly variable. However, under about 20,000 years the results can be compared with dendrochronology, based on tree rings.




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