Dating fossils and artifacts
It wasn’t until the late nineteenth century that archaeologists began using dating techniques, specifically relative dating, which began to provide an acceptable degree of accuracy for dating old things.
Then in the early twentieth century scientists began using absolute dating techniques, perhaps the most prominent of which is carbon-14.
"This technique stands to revolutionize radiocarbon dating," said Marvin Rowe, Ph. "It expands the possibility for analyzing extensive museum collections that have previously been off limits because of their rarity or intrinsic value and the destructive nature of the current method of radiocarbon dating.
In theory, it could even be used to date the Shroud of Turin." Rowe explained that the new method is a form of radiocarbon dating, the archaeologist's standard tool to estimate the age of an object by measuring its content of naturally-occurring radioactive carbon.
Relative techniques can determine the sequence of events but not the precise date of an event, making these methods unreliable.
b) Absolute These methods are based on calculating the date of artefacts in a more precise way using different attributes of materials.