The method of dating that scientists should use to find the absolute age of a fossil from 65 million years ago is uranium dating. Carbon dating is only accurate up to about 50,000 years ago, and ring counting would only work if the fossil was a tree or had growth rings. Relative dating can give an idea of the age of the fossil in relation to other fossils, but it doesn't provide an absolute age. Uranium dating, on the other hand, can accurately determine the age of rocks and fossils millions of years old by measuring the decay of radioactive isotopes.
