Art has long been the way for people to express themselves as evidenced by the art found in The Cave of Lascaux. People are driven to draw the world around them. Whether it is for posterity or just for fun or to record a hunt or other important event, they draw. And fortunately we have found drawings from the past that give us insight to the people who made them and the times they lived in.
Recently, Aborginal Rock Art has been discovered in Australia that may revise the Australian History Books. In years past it has been believed the Aborginies were relatively isolated, but this recent discovery shows that they have had contact with others throughout the millenium.
Enjoy more pictures at National Geographic.