Radiocarbon dating also referred to as carbon dating or carbon-14 dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.
A molecule of DNA is a polymer composed of nucleotides. Each nucleotide is composed of a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group.
The South American countries that lie within the Tropic of Capricorn are Argentina, Brazil, Chile and Paraguay. Brazil is the only country in the world that crosses both the Equator and either tropic.