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Friday, April 6, 2018

The Crystals That May Have Helped Vikings Navigate Northern Seas by STEPH YIN

By STEPH YIN Norse sagas refer to “sunstones,” and new computer simulations shore up a hypothesis that they were used to guide ships as far as Greenland when weather was poor. Published: April 5, 2018 at 08:00PM from NYT Science https://nyti.ms/2Iz7swS

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