Relative absolute dating techniques archaeology
In 1949, American chemist Willard Libby, who worked on the development of the atomic bomb, published the first set of radiocarbon dates.
His radiocarbon dating technique is the most important development in absolute dating in archaeology and remains the main tool for dating the past 50,000 years.
In fact, levels of Carbon-14 have varied in the atmosphere through time.
One good example would be the elevated levels of Carbon-14 in our atmosphere since WWII as a result of atomic bombs testing.
Relative dating stems from the idea that something is younger or older relative to something else.
Long tree-ring sequences have been developed throughout the world and can be used to check and calibrate radiocarbon dates.