https://www.youtube.com/watch?v=HpOlY1jOcrY
On April 14 2018, Operation Ice Bridge captured images over the Beaufort Sea, 50 miles northwest of the Mackenzie River Delta. The images, taken by mission scientist John Sonntag, show unusual or “curious” circles that the government agency can’t explain. “We saw these sorta-circular features only for a few minutes today,” Sonntag wrote from the field.
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