Olga Soffer, an archeologist from the University of Illinois states that, "art is a social phenomenon that appears and disappears and, in some places, may not rise at all". A petroglyph is an image or a pattern of geometric patterns on rocks created by carving or digging into a rock to create the desired image. Before metal tools, most petroglyphs were scratched in the rock using bones or antlers. However, it is possible that a wide variety of tools were used in order to attain the desired effect. Rock Art: Petroglyphs and Pictographs

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