Here is one for you that will raise some historic interest. I found some of the connections pretty intriguing... Several chapters of cool Viking stuff... :)
https://www.spirasolaris.ca/1aintro.html
Thanks. I used to know a guy online who said he had his old family records (centuries ago) regarding some ancestors’ trade with the east end of Siberia, during the 24 hour daylight the whole stretch of Arctic Asia was navigable. If this were legit, I’d have had that published as soon as I found out about it, but maybe that’s just me.
His graphics regarding the Medieval climate:
https://www.spirasolaris.ca/liav3l3s2.gif
https://www.spirasolaris.ca/liav3g2.gif
