Carbon dating and dna testing
Radiocarbon, or carbon-14 (also written as C), is an isotope of carbon that is unstable and weakly radioactive.
Carbon-14 is present in all living things in minute amounts.
It then uses this information to determine the last time the fossil was respiring carbon (i.e. A radiocarbon dating lab is able to do this using the known “half-life” of carbon-14.
The half-life of carbon-14 is the amount of time it takes for one-half of the original amount to disappear by radioactive decay.
When a plant stops assimilating carbon dioxide or when an animal or human being stops eating, the ingestion of carbon-14 also stops and the equilibrium is disrupted.
From that time forward, the only process at work in the body is radioactive decay.
Since it is radioactive, it gradually fades away by radioactive decay until it is all gone.
Radiocarbon dating uses carbon-14 to determine the last time something (or someone) was alive.
This discussion is a simplified introduction to radiocarbon dating.Eventually, all the carbon-14 in the remains will disappear.This principle applies equally to a person dying, a corn stalk being cut down, or to a soybean plant being pulled out of the ground.Animals eat plants and/or other animals; humans eat plants and animals.Therefore all living plants, animals, and human beings have the same amount of carbon-14 in their bodies at the same time.
When they stop living, they stop taking in carbon-14 from the air around them, and the amount of carbon-14 in the remains gradually disappears.