A Picture Is Worth A Thousand Words
Long before pens and paper, people carved or painted pictures on rocks to tell stories about their lives. Have you ever "written" a message using pictures without words? This is exactly what ancient artists did on the walls of caves, the faces of rock cliffs and on huge boulders.
Rock carvings are called petroglyphs. Petroglyphs were created by grinding, scratching or pecking the rock's surface. Rock paintings are called pictographs. Powdered minerals, ground plants, charcoal and animal blood were used to "paint" pictographs. The pictographs that have survived until today are most often found in caves and other places protected from the weather.
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