Here's something to ponder ..... "IF" this formation was man made, allowing for time to get into and out of the field, under cover of darkness .... the construction time left, should be around 4 hours. Given that ... there are over 400 circles ... some of which span approximetely 70 feet in diameter .... that would mean that one of those circles would need to be created every 30 seconds, and that's not even allowing any time for the surveying, purely flattening this formation ... pushes the timespan, and that's a massive understatement !!!!!

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