With the change from Olduwan to Acheulean technique, hominins got more of a return for a given output of energy and could do more. The chief technological development was the edge of the handax. The advantage of the "core reduction strategy" was more and thinner flakes per mass of cores. More and better flakes meant better use of carcasses and therefore a need for fewer carcasses, less hunting, etc. Moreover, the increased number of flakes available made ranging farther from the source of the stone possible and gave more staying power to the hunt.
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