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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The tradition of putting tangerines in stockings comes from 12th-century French nuns who left socks full of fruit, nuts and tangerines at the houses of the poor.
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Gold-wrapped chocolate coins commemorate St Nicholas who gave bags of gold coins to the poor.
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Rudolph the red-nosed reindeer was invented for a US firm's Christmas promotion in 1938.
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English Puritan leader Oliver Cromwell banned Christmas between 1647 and 1660 because he believed such celebrations were immoral for the holiest day of the year.
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Frumenty was a spiced porridge, enjoyed by both rich and poor. It was a forerunner of modern Christmas puddings. It is linked in legend to the Celtic god Dagda, who stirred a porridge made up of all the good things of the earth.
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The world's tallest Xmas tree at 221ft high was erected in a Washington shopping mall in 1950.
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