Comparing: NASA baffled by mysterious ice circles in the Arctic

https://www.washingtonpost.com/news/speaking-of-science/wp/2018/04/23/nasa-baffled-by-mysterious-ice-circles-in-the-arctic/

• Pink: Archived April 23, 2018 at 2:56pm EDT
• Green: Archived April 23, 2018 at 3:15pm EDT

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