'Klaxon' is a name that does not belong to one of Santa's reindeer. A klaxon is actually a powerful electric horn. Its name comes from a German word meaning "shriek".
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Black Friday in the UK is the Friday before Christmas. Instead of shopping, many people get very drunk!
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Robins on cards were a joke 150 years ago when postmen wore red tunics and were named after them.
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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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US scientists calculated that Santa would have to visit 822 homes a second to deliver all the world's presents on Christmas Eve, travelling at 650 miles a second.
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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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