Until now, the oldest evidence of stone-tool use was ahaul of more than 2,600 stone flakes estimated to be 2.5m years old that was discovered in another part of Ethiopia in 1997.
Until now, the oldest evidence of stone-tool use was ahaul of more than 2, 600 stone flakes estimated to be 2.5m years old that was discovered in another part of Ethiopia in 1997.