Did Vikings Use Sunstones for Navigation? | Iceland Spar Explained

Описание: Did the Vikings really use sunstones to navigate the open sea?

In this video, I examine the theory that Vikings used sunstones—specifically Iceland spar (calcite)—to locate the sun on cloudy days and navigate long sea voyages, including routes from Norway to Greenland.

We look at archaeological evidence, historical sources, and references from the Icelandic sagas, including Rauðúlfs þáttr, which is often cited in discussions about Viking navigation. I also explain how Iceland spar works, why it was so important to the development of optics, and how its unique light-polarizing properties make sun navigation possible.

The video covers:
What a Viking sunstone is
-Where Iceland spar comes from
-What the sagas actually say
-Why no sunstones have been found in Viking ship excavations
-Academic research and computer simulations testing sunstone navigation
-Whether this method could realistically have worked in the Viking Age

While modern research shows that sunstones can be used to locate the sun with surprising accuracy, there is still no direct archaeological proof that Vikings used them as navigational tools. This video presents the evidence, the science, and the unanswered questions—so you can decide for yourself.

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