| Humans first made tools of stone at least 2.5 million years ago, initiating the so-called Stone Age. The Stone Age advanced through three stages over time—the Paleolithic (which is subdivided into Lower, Middle, and Upper periods), Mesolithic, and Neolithic. Blade toolmaking, as demonstrated in this video, was a development of the Upper Paleolithic, which began about 40,000 years ago. This technique produced a far greater variety and higher quality of tools than did earlier methods of toolmaking. |
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