What Era Of Painting Were Found Inside The Caves Which Have Their Way Of Communicating With Each Other?

What Era Of Painting Were Found Inside The Caves Which Have Their Way Of Communicating With Each Other? Petroglyphs 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. to modern times, depending on culture and location. What period