These methods are: The University of Arizona used advanced methods to carbon date various Dead Sea Scrolls.
Therefore, the 70-weeks is based on multiplying 70 time 7-years, which equals 490 years.
At various stages during this time, specific human events are expected to occur.
In support of the carbon dating done by independent labs, the Israel Antiquities Authority stated in a news release that "Some of the papyrus samples bear exact written dates within the text itself.
These dates match those determined by the carbon-14 measurements.
As we move into verifying the individual prophecies contained in the 70-weeks prophecy, we will begin to understand why conservative scholars hold to the position that Daniel was authored as early as 530 BCE. Daniels reason for praying is that another Jewish prophet, Jeremiah (refer to Jeremiah -12) had already foretold that the Jewish people would return to Jerusalem (Daniel 9:2-3).