The Paleolithic (US spelling; also spelled Palaeolithic or Pal?olithic) Age, Era or Period, is a prehistoric period of human history distinguished by the development of the most primitive stone tools discovered (Grahame Clark's Modes I and II), and covers roughly 99% of human technological prehistory. It extends from the earliest known use of stone tools, probably by Hominins such as Australopithecines, 2.
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