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Ancient Observatory near 5,000+ petroglyphs MINNESOTA (1 reply)

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"Further study would confirm that indeed this configuration of boulders, thought to be 1,000 to 3,000 years old, was constructed to mark celestial activity. It stretched 31 feet, 10 inches long and 21 feet, 4 inches wide and its makers chose pink feldspar-rich granite boulders for the creation.

This ancient “observatory” was created with an astounding mathematical and astronomical knowledge. “It’s the most accurate observatory I’ve ever seen. For every alignment, it’s dead-on,” Sanders said

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