Petroglyphs and Pictographs (Encyclopedia of Science)
Petroglyphs and pictographs are terms used by archaeologists to describe forms of rock carvings and paintings. Petroglyph refers to a rock carving or etching, while pictograph is commonly applied to a rock painting. Typically, these "rock art" examples are found in caves or under overhanging cliffs. Although both types of rock art can be traced back to early prehistoric times, many traditional aboriginal (native) cultures in Africa and Australia still practice the art of rock painting.
Origins of rock art
Some of the oldest known rock art features are pictographs. In France and Spain, cave paintings made by early humans have been dated to more than 30,000 years old. Located in deep, underground passages, they have been protected from rain, sunlight, and other ravages of time. Most of these colorful images are of animals such as deer, bison, and antelope. They are strikingly detailed and lifelike.
When humans migrated to North America some 12,000 years ago, they brought the practice of creating rock art with them. As time passed
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