Research has been ongoing since the 1960s to determine what the proportion of in the atmosphere has been over the past fifty thousand years.
The resulting data, in the form of a calibration curve, is now used to convert a given measurement of radiocarbon in a sample into an estimate of the sample's calendar age.
A third viewpoint places the final editorial work in the fourth century BC.
The first six chapters comprise a series of court tales involving Daniel and his three companions.
The Jewish Tanakh places the Book of Daniel with the Ketuvim writings, and Daniel in rabbinic literature is not counted in the list of Prophets of the Jewish canon.
By contrast, Daniel is included amongst the major prophets in the Christian canon of the Old Testament.
Additional complications come from the burning of fossil fuels such as coal and oil, and from the above-ground nuclear tests done in the 1950s and 1960s.This section tells of the persecutions that Daniel and his friends undergo, and also of the high positions that Daniel attains.It relates the fact that God is in control, and how He protects His faithful servants. The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.Libby received the Nobel Prize in Chemistry for his work in 1960.The court tales span events that occur during the reigns of Nebuchadnezzar, Belshazzar, and Darius the Mede.