Researchers have pinned the age the Earth to around 4. The earliest evidence of the genus Homo dates back to 2. All these dates come from radiometric dating — a process that looks at different isotopes in samples. Since some isotopes decay faster than others, the ratio between isotopes can provide a date. Carbon atoms in the air end up in all sorts of organic material: plants draw in carbon dioxide, animals and humans eat the plants and the carbon ends up building tissues, including the isotope carbon 14 which is unstable. As soon as a plant or animal dies, it no longer incorporates new carbon 14, and the atoms already present start to decay to the nonradioactive isotopes carbon and carbon
Carbon Dating System
Deano’s answer to: “Where can I have carbon dating done, and how much does it cost?” – nutriologia-ortomolecular.info
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Carbon Dating The Web
In this section we will explore the use of carbon dating to determine the age of fossil remains. Carbon is a key element in biologically important molecules. During the lifetime of an organism, carbon is brought into the cell from the environment in the form of either carbon dioxide or carbon-based food molecules such as glucose; then used to build biologically important molecules such as sugars, proteins, fats, and nucleic acids. These molecules are subsequently incorporated into the cells and tissues that make up living things. Therefore, organisms from a single-celled bacteria to the largest of the dinosaurs leave behind carbon-based remains.
Whenever the worldview of evolution is questioned, the topic of carbon dating always comes up. Here is how carbon dating works and the assumptions it is based upon. Radiation from the sun strikes the atmosphere of the earth all day long. This energy converts about 21 pounds of nitrogen into radioactive carbon