当人类开始直立行走,第一次用木棍在狩猎中打死野兽,便不再是靠四肢行走的灵长目动物,而成为有着思考能力、能够制造并使用工具的人类。但那时的人们还有一个头疼不已的问题,面对那些奔走如飞的动物,即便是把手中削尖的木棍当作投枪掷向猎物,依然无法命中。直到在三万年 When humans begin to walk upright, killing the beasts with their sticks for the first time in hunting is no longer a primate who walks on all fours, but a man of thought capable of making and using tools. But then there was another headache for those people who were still having headaches. Even in the face of running animals, even sharpened wooden sticks were thrown to their prey as throwing guns and still could not hit. Until thirty thousand years