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Five Medieval Alternatives to Sat Nav

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Viking weather vane

This decorative 11th century weather vane, found in a church is Norway, probably adorned the prow of a Viking ship. Today, weather vanes on churches and roofs tell you which way the wind is blowing. But Viking versions had a different purpose.

Credit: Universitetets Oldsaksamling, Oslo/Werner Forman Archive

During the Middle Ages, the Vikings set sail in longships to raid faraway settlements and plunder their riches, but how did they find their way?

From New Scientist
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