The oldest uncontested fossils on earth are 2 billion year-old stromatolites in Minnesota, Wisconsin, and Ontario.
Ice cores, pollen, wood, hair, bone, shell, bird egg shell, and coral are some of the things datable by this technology which depends on measuring the atomic decay rate of carbon isotopes.
Organisms usually need to be covered by mud, sand, tar or some other sediment as soon as possible or frozen or dessicated (dried out) for fossilization to occur.
Fossils, by definition, are the remains or traces of organisms that lived at least 10,000 years ago.
Radiocarbon dating is a method of estimating the age of organic material.
It was developed right after World War II by Willard F.