Study of stone-age engravings suggests they were created with aesthetic intention
(PHYSorg.com Archaeology & Fossils)

A team of researchers from Denmark, Australia and South Africa has found evidence that suggests stone-age etchings found at two sites in South Africa were created with aesthetic intention and that they evolved over time. In their paper published in Proceedings of the National Academy of Sciences, the group describes experiments they carried out with volunteers looking at reproductions of stone-age engravings and what they learned from them.