Carbon dating is a variety of radioactive dating which is applicable only to matter which was once living and presumed to be in equilibrium with the atmosphere, taking in carbon dioxide from the air for photosynthesis.In easy words it a method which scientists use to find that to which time period that animal or creature belongs to.
The study of fossils is called palaentology. this determines the age of fossil by using carbondating method. The breakdown of radioactive isotopes of certain elements such as carbon uranium take place at a known rate.So this is how the age of rock or mineral containing can be calculated.