A cache of ostrich eggshell fragments discovered by archaeologists in South Africa could be instrumental in understanding how humans approached art and symbolism as early as the Stone Age. The eggshells, engraved with geometric designs, may indicate the existence of a symbolic communication system around 60,000 years ago among African hunter-gatherers [Discovery News].
At a site known as the Diepkloof Rock Shelter, a team led by archaeologist Pierre-Jean Texier discovered fragments of 25 ostrich eggs that date back 55,000 to 65,000 years. In an online paper published in the Proceedings of the National Academy of Sciences, the archeologists revealed that the eggshell fragments were etched with several kinds of motifs, including parallel lines with cross-hatches and repetitive non-parallel lines [ScienceNow]. The scientists are confident that the markings are almost certainly a form of messaging — of graphic communication [BBC].
Further study of the fragments revealed that a hole had been drilled at the top of some eggshells, suggesting that the hunter-gatherers could have used them as water containers during long hunts in arid regions, as the Kalahari hunter-gatherers were known to do in more recent history. Scientists estimate that each egg could have held one liter of water. The patterns on the shells, they propose, could have been a symbolic way of acknowledging the individual who used the canteen, or which community or family the user belonged to. For scientists studying human origins, the capacity for symbolic thought is considered a giant leap in human evolution, and [what] sets our species apart from the rest of the animal world [BBC].
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