Benefits of radiocarbon dating
You might remember that it was mentioned earlier that the amount of carbon-14 in living things is the same as the atmosphere.
For example, look at this image of the opening of King Tutankhamen's tomb near Luxor, Egypt during the 1920s.
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Scientists often use the value of 10 half-lives to indicate when a radioactive isotope will be gone, or rather, when a very negligible amount is still left.
This is why radiocarbon dating is only useful for dating objects up to around 50,000 years old (about 10 half-lives).
Libby was awarded the Nobel Prize in chemistry for his work in 1960.