Klerksdorp spheres

These mysterious metal spheres that are often classified as out of place artifacts are found in Ottosdal, South Africa. They have been dated to be 3 billion years old when the earth was too young to host intelligent life capable of creating these spheres and hence won the attraction of the scientific community.

However various geologists agree that the spheres originated as concretions which formed in sediments, ash or both after they accumulated.

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Good books for students studying for GCE A/L examination...

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