Miners in South Africa have been finding grooved spheres in Precambrian rocks. These rocks are 2.8 billion years old. "The Groove Spheres". Here are a few more references "Klerksdrop Spheres", "The South African Spheres", "Case of the Grooved Spheres".
I happened to stumble upon this at "The 10 Most Puzzing Ancient Artifacts".
Tuesday, April 14, 2009
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