Carbon dating has the peculiar property that it works primarily on dead things.
Other forms of radioactive dating are more broadly applicable.
First of all, our instruments used to detect the amount of radioactivity in samples aren't perfect.
The New Zealand curve is representative for the Southern Hemisphere, the Austrian curve is representative for the Northern Hemisphere. C is the radioactive one, its half-life (time it takes to reduce its radioactivity by half) is about 5,730 years.
Atmospheric nuclear weapon tests almost doubled the concentration of Radiocarbon dating, also known as the C14 dating method, is a way of telling how old an object is. This makes it possible to tell the age of substances that contain carbon. Dates obtained are usually written as before present ('present' is 1950).
He first demonstrated the accuracy of radiocarbon dating by accurately estimating the age of wood from an ancient Egyptian royal barge of which the age was known from historical documents.
The Centre for Isotope Research (CIO) conducts radiocarbon-based research, and offers a radiocarbon dating service.
Carbon dating (also called radiocarbon dating) is a very useful archeological tool, but it does have its limitations.