The Uunartoq disc was discovered in an 11th century convent in Greenland in 1948. It is thought to have been used as a compass by the Vikings as they traversed the North Atlantic Ocean from Norway to Greenland.
Credit: Copyright Proceedings of the Royal Society A; Balazs Bernath; Alexandra Farkas; Denes Szaz; Miklos Blaho; Adam Egri; Andras Barta; Susanne Akesson; and Gabor Horvath
Often regarded as ruthless robbers, the Vikings were also impressive mariners capable of traversing the North Atlantic along a nearly straight line. Now, new interpretations of a medieval compass suggest the sea robbers may have skillfully used the sun to operate the compass even when the sun had set below the horizon.
The remains of the supposed compass — known as theUunartoq disc— were found in Greenland in 1948 in an 11th-century convent. Though some researchers originally argued it was simply a decorative object, other researchers have suggested the disc was an important navigational tool that theVikings would have used in their roughly 1,600-mile-long (2,500 kilometers) trek from Norway to Greenland.
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