Inscribed ostrich shell fragments found in South Africa are among the earliest examples of the use of symbolism by modern humans, scientists say.
The etched shells from Diepkloof Rock Shelter in Western Cape have been dated to about 60,000 years ago.
Details are reported in the Proceedings of the National Academy of Sciences.
http://news.bbc.co.uk/2/hi/science/nature/8544332.stm
