Geographers in ancient times may have guessed that... ...squo;s also possible that they found their way to Iceland , where manmade caves, decorated with crosses, hav... ...enting the natural history of the ebb and flow of Arctic ice . Read more about the history of frozen seas as we...
https://www.neatorama.com/2017/01/21/The-First-Observations-of-Sea-Ice-Came-From-8th-Century-Irish-Monks-in-Iceland/
The First Observations of Sea Ice Came From 8th-Century Irish Monks in Iceland
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