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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'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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There are 13 Santas in Iceland, each leaving a gift for children. They come down from the mountain one by one, starting on December 12 and have names like Spoon Licker, Door Sniffer and Meat Hook.
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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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The poinsettia is a traditional Christmas flower. In Mexico (its original birthplace), the poinsettia is known as the "Flower of the Holy Night".
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At Christmas, it is traditional to exchange kisses beneath the mistletoe tree. In ancient Scandinavia, mistletoe was associated with peace and friendship. That may account for the custom of "kissing beneath the mistletoe".
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7.6 million Christmas trees are sold each year.
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