And even more in the primary source, open access journal article: https://doi.org/10.15184/aqy.2020.2 https://doi.org/10.15184/aqy.2020.2 (linked from the Natio

And even more in the primary source, open access journal article: https://doi.org/10.15184/aqy.2020.2 https://doi.org/10.15184/aqy.2020.2 (linked from the National Geographic article but not the Scientific American one that I could find).