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BookmarkPetroglyphs are images incised in rock, usually by prehistoric, especially Neolithic, peoples.
They were an important form of pre-writing symbols, used in communication from approximately 10,000 B.C.E.
to modern times..
For more information about the topic Petroglyph, read the full article at Wikipedia.org, or see the following related articles:
Stone Age — The Stone Age is a broad prehistoric time period during which humans widely used stone for toolmaking. Stone tools were made from a variety of ... > read more
Cave painting — Cave or rock paintings are paintings painted on cave or rock walls and ceilings, usually dating to prehistoric times. Rock paintings have been made ... > read more
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