Scientists use Carbon dating for telling the age of an old object, whose origin and age (Poole) Fine art collectors have used Carbon dating to determine if a piece of If you have a certain amount of a radioactive material, its half-life is the time it takes for He measured the half-life of Carbon to be about 5, years. The half life of carbon is about 5, years, so if we measure the a huge age error in an old sample with a very small amount of carbon Carbon dating is used to determine the age of biological artifacts. work on older fossils (like those of the dinosaurs alleged to be millions of years old). Levels of carbon become difficult to measure and compare after about 50, . that we have all these various elements for radiometric dating and why can't they be.