11/27/05 First Samples of Prehistoric Flint Stones Discovered in Iran The first samples of flint stones in Iran belonging to 9000 years ago have been identified in Yeri City historical site. Tehran, 27 November 2005 (CHN) -- The third season of archaeological excavations in the historical site of Yeri City in Ardabil province resulted in the discovery of 9000-year-old flint stones. It is the first time that traces of flint stones from pre-historic periods of Iran have been discovered. During the Neolithic epoch, due to the increase of temperature, environmental circumstances provided human beings with greater food resources. Within this...