The World's Largest Stone Sphere is Evidence of a Lost Ancient Civilization

Other Reasons

Although the Costa Rican spheres were likely handmade, the Bosnian sphere had some significantly different properties that would suggest that is was of a different origin. This brought Dr. Hoopes to the conclusion that these stones were most possibly created by a natural process called concretion. In fact, there are some rocks in New Zealand that are famous for being formed in this way, and they're called the Koutu Boulders...

The More You Know

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Post originally appeared on Upbeat News.