Libby later received the Nobel Prize in Chemistry in 1960 for the radiocarbon discovery.Today, there are over 130 radiocarbon dating laboratories around the world producing radiocarbon dates for the scientific community.The half-life refers to the amount of time it takes for half the radiocarbon in a sample of bone or shell or any carbon sample to disappear.
During the period of a plant's life, the plant is taking in carbon dioxide through photosynthesis, which is how the plant makes energy and grows.
Animals eat plants, and some eat other animals in the food chain.
Carbon follows this pathway through the food chain on Earth so that all living things are using carbon, building their bodies until they die.
A tiny part of the carbon on the Earth is called Carbon-14 (C14), or radiocarbon.
Because carbon is very common on Earth, there are alot of different types of material which can be dated by scientists.
Below is a list of the different kinds of materials which can be dated: Libby tested the new radiocarbon method on carbon samples from prehistoric Egypt whose age was known.The job of a radiocarbon laboratory is to measure the remaining amounts of radiocarbon in a carbon sample.This is very difficult and requires a lot of careful work to produce reliable dates.After twice that time (about 11000 years), another half of that remaining amount will have disappeared.After another 5568 years, again another half will have disappeared.You can work out that after about 50 000 years of time, all the radiocarbon will have gone.