The earliest strategies of stone tool making, generally recognized as the Oldowan “trade,” date again to at least 2.three million years ago, with the earliest direct evidence of device utilization present in Ethiopia throughout the Great Rift Valley, relationship back to 2.5 million years ago. This period of stone tool use known as the Paleolithic, or “Old stone age,” and spans all of human history as much as the event of agriculture approximately 12,000 years in the past. The use of tools by early people was partly a means of discovery, partly of evolution.
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