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20 May

Some Neolithic (later stone age) remains were dated back to fifty thousand years in Russia and Africa.

The city of Eriha in Palestine was dated back to eleven thousand years, and was designated as the first permanent human settlement.

­ ­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.

Since all living organisms on Earth are made up of organic molecules that contain Carbon atoms derived from the atmosphere, they therefore contain Carbon-14 atoms.

The Carbon-14 within a living organism is continually decaying, but as the organism is continuously absorbing Carbon-14 throughout its life the ratio of Carbon-14 to Carbon-12 atoms in the organism is the same as the ratio in the atmosphere.

The unstable Carbon-14 within the organism begins to decay to form Nitrogen-14 by emitting a beta particle.

By measuring the ratio of Carbon-14 in a sample and comparing it to the amount in a recently deceased sample its date can be determined.

Materials that originally came from living things, such as wood and natural fibres, can be dated by measuring the amount of carbon-14 they contain.

By Kamil Erkan Libbys discovery, now known as the carbon-14 (or radiocarbon) technique, was a method that could be used to determine the age of organic remains.

In the following years, archeologists used this technique extensively and determined exact dates for pre-historic settlements in the ancient world.