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Radiocarbon is then taken in by plants through photosynthesis, and these plants in turn are consumed by all the organisms on the planet.

So every living thing has a certain amount of radiocarbon within them.

Rodents, for example, can create havoc in a site by moving items from one context to another.

Natural disasters like floods can sweep away top layers of sites to other locations.

An extensive tree-ring sequence from the present to 6700 BC was developed in Arizona using California bristlecone pine (), some of which are 4900 years old, making them the oldest living things on earth.

Therefore, radiocarbon dates need to be calibrated with other dating techniques to ensure accuracy.

Plants are not the only organism that can process Carbon-14 from the air.

There are two techniques for dating in archaeological sites: relative and absolute dating.

Relative dating stems from the idea that something is younger or older relative to something else.

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