Carbon 14 has a half-life of 5,780 years, and is continuously created in Earth's atmosphere through the interaction of nitrogen and gamma rays from outer space.
Because atmospheric carbon 14 arises at about the same rate that the atom decays, Earth's levels of carbon 14 have remained fairly constant.
This procedure of radiocarbon dating has been widely adopted and is considered accurate enough for practical use to study remains up to 50,000 years old.
It's one of those words with which most people are familiar, but have vastly differing opinions of what it means. It summons visions of men women with small tokens of affection and asking their hand in marriage on bended knee.
Conversely, such practices may be outlawed and penalized in parts of the world out of concerns for women's rights and because of international law.
If you are familiar with computer programming terminology, you can liken dating to a sub-routine that has been added to the system of courtship.Among its churches the most remarkable is the cathedral of St Peter, dating from the 15th century, with a tower 300 ft. We have now to mention but one more custom, dating from those great days.The peanut, or ground-nut (Arachis hypogaea), is another widely-cultivated plant, dating from pre-Columbian times.One of the most curious rows is the Shambles, on a narrow street and dating from the fourteenth century.Many of the tablets were ancient, dating back as far as 1706.