According to researchers, a recently collected cache of ostrich eggshells were used as symbolic methods of communication among African hunter-gathers 60,000 years ago. These shells have been collected over a period of the last few years at Diepkloof Rock Station in South Africa by the University of Bordeaux. Two hundred and seventy in all, this is a large enough sample to demonstrate that Stone Age people created design traditions. Some of these eggshells also have holes in them, demonstrating that they were used as canteens.
Read about the eggshell cache and see a sample of the finds on news.discovery.com here.