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2.8-Billion-Year-Old Spheres Found in South Africa: How Were They Made?
These spheres are said to be more than 2.8 billion years old, almost perfectly balanced, with grooves carved around the middle. How were they made? Were there people on Earth so long ago?
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2.8-Billion-Year-Old Spheres Found in South Africa: How Were They Made?
These spheres are said to be more than 2.8 billion years old, almost perfectly balanced, with grooves carved around the middle. How were they made? Were there people on Earth so long ago?
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