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With this enhance in population and availability of labor got here a rise in labor specialization. The earliest stone tools were crude, being little greater than a fractured rock. In the Acheulian period, beginning roughly 1.65 million years in the past, strategies of working these stone into particular shapes, similar to hand axes emerged. The Middle Paleolithic, roughly 300,000 years in the past, saw the introduction of the prepared-core technique, the place a number of blades could presumably be quickly formed from a single core stone.

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