The document discusses different forms of rock art including pictographs, petroglyphs, and earth figures. Pictographs are painted designs made using minerals like red ochre, charcoal, or white chalk. Petroglyphs are carved designs made using hammerstones. Earth figures are large motifs made on the ground by scraping away pebbles or piling up rocks. Rock art was used to mark territory, record histories, or in rituals. Cave art includes painted drawings on cave walls, often of hands or animals. The oldest dated rock art is in Europe, Africa, North and South America, and Australia, ranging from 28,000 to 40,000 years old.