Carbon is naturally in all living organisms and is replenished in the tissues by eating other organisms or by breathing air that contains carbon.
At any particular time all living organisms have approximately the same ratio of carbon 12 to carbon 14 in their tissues.
They are then able to calibrate the carbon dating method to produce fairly accurate results.
Carbon dating is thus accurate within the timeframe set by other archaeological dating techniques.
By taking a carboniferous specimen of known age (that is, a specimen which we are able to date with reasonable certainty through some archaeological means), scientists are able to determine what the ratio was during a specimen's lifetime.This one is dedicated to Susan Gerbic and her team of wikipedia editors, fighting the good fight against facts claimed without references. You mean that somebody just made up all that stuff about them? Since last January we’ve been bringing science programming to bars, theaters, and comic cons in Colorado.As I often say during Facebook arguments: link, or it didn’t happen. Our flagship program is called the Peer Revue, where we teach scientists to perform stand-up comedy then throw them on stage in front of a live audience.This property makes it especially useful in a process known as “radiocarbon dating”, or carbon dating for short.Radiocarbon enters the biosphere through natural processes like eating and breathing.On the other hand, atmospheric testing of nuclear weapons during the 1950s and 1960s is likely to have increased the Carbon 14 content of the atmosphere.