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Appl Opt. 1994 Jul 20;33(21):4754-5. doi: 10.1364/AO.33.004754.

Disputing Viking navigation by polarized skylight.

Abstract

The widely held notion that the Vikings utilized polarization of skylight on overcast days for navigational purposes is demonstrated to have no scientific basis. The use of polarized skylight for navigation under partly cloudfree skies should be treated with caution and skepticism.

PMID:
20935849

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