Radiocarbon helps date ancient objects—but its not perfect. For nearly 70 years, archaeologists have been measuring carbon-14 levels to date sites and artifacts. Nothing good can last—and in the case of carbon-14, a radioactive isotope found in Earths atmosphere, thats great news for archaeologists.

Can carbon dating be used on fossils?

While people are most familiar with carbon dating, carbon dating is rarely applicable to fossils. Carbon-14, the radioactive isotope of carbon used in carbon dating has a half-life of 5730 years, so it decays too fast. It can only be used to date fossils younger than about 75,000 years.

Can carbon dating be used on living things?

Carbon dating is used to work out the age of organic material — in effect, any living thing. Organisms capture a certain amount of carbon-14 from the atmosphere when they are alive.

Can you carbon date teeth?

The slow, but variable turnover of cartilage makes it an unsuitable tissue for age determination. Although dental enamel is the hardest substance in the body, teeth are not routinely used in traditional radiocarbon dating due to fear of carbonate mineral exchange during centuries of burial.