Media Timeline By elein 35,000 BCE PREHISTORIC AGE Prehistoric refers to the time before the existence of written or recorded history. Petroglyphs can be carvings or engravings in rocks or caves. Pictographs used to refer to sketches and paintings that usually depict nature. 35,000 BCE Cave Painting Period: 35,000 BCE to 220 PREHISTORIC AGE 2400 BCE Clay Tablets in Mesopotania
