EGYPT - NOVEMBER 01: Exclusive : Adaima Or The Birth Of Pharaoh On January 11Th, 2002, Egypt. Flint Knives, Found Mostly In The Domestic Zone. The Denticulate Blades Date From The Later Neolithic. The Small Disposable Blades Were Stuck Into A Wooden Handle And Were Used As A Sickle. Adaima. (Photo by Patrick AVENTURIER/Gamma-Rapho via Getty Images)