Fun fact: Bluetooth has Viking origins. Creator Jim Kardach was inspired by Danish king Harald Bluetooth, famous for uniting his people and conquering Norway. According to National Geographic, Harald got his curious moniker for having a ‘dark’ tooth — the adjective for a dark color in Old Norse also means ‘blue.’ Kardach found a use for this historical analogy of uniting or conquering all the different ‘tribes’ and placing them under one ‘banner,’ and thus Bluetooth was born. Even the logo
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