This is an amazing cave wall painting in Lascaux Cave. It shows 2 bison or buffalo trotting around. It shows depth with the one behind the other and the closer one is larger. It shows movement by the position of their legs and movement shows the passage of time.... the 4th dimension!! A demonstration of the 4th dimension on a cave wall 10,000 to 30,000 year ago!! Amazing!! What will they think of next?