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  1. Stone Age - World History Encyclopedia

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    Stone Age, prehistoric cultural stage, or level of human development, characterized by the creation and use of stone tools, the oldest known of which date to some 3.3 million years ago. The Stone Age is usually divided into three separate periods: Paleolithic, Mesolithic, and Neolithic.
    The Stone Age began about 2.6 million years ago, when researchers found the earliest evidence of humans using stone tools, and lasted until about 3,300 B.C. when the Bronze Age began. It is typically broken into three distinct periods: the Paleolithic Period, Mesolithic Period and Neolithic Period. Did you know?
    The Stone Age was a broad prehistoric period during which stone was widely used to make stone tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years and ended between 4,000 BC and 2,000 BC, with the advent of metalworking. It therefore represents nearly 99.3% of human history.
    en.wikipedia.org
    The Stone Age, whose origin coincides with the discovery of the oldest known stone tools, which have been dated to some 3.3 million years ago, is usually divided into three separate periods— Paleolithic Period, Mesolithic Period, and Neolithic Period —based on the degree of sophistication in the fashioning and use of tools.