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Which legendary Viking king is often associated with the unification of Denmark?

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Correct answer: Harald Bluetooth

Harald Gormsson, known as Harald Bluetooth, was a 10th-century Viking king who united Denmark and Norway and introduced Christianity. His nickname, possibly referring to a dead tooth, surprisingly inspired the naming of the modern wireless technology, Bluetooth, due to its ability to unite different communication protocols, just as he united tribes. Photo: Anagoria, Wikimedia Commons, CC BY 3.0.

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Source: Wikipedia (CC BY-SA)

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