Did you follow Santa on his journey around the world? NORAD tracks Santa on Christmas Eve. Tracking began by accident in 1955.
Before NORAD was formed, when it was still the Continental Air Defence Command (Conad), a newspaper misprinted a Sears Roebuck & Co. advertisement containing the phone number for children to call in to talk to Santa. Instead of reaching Santa, children reached Conad operations in Colorado.
"A colonel by the name of Harry Shoup picked up the phone and assured children who called in that Santa was safe and CONAD, at the time, would be tracking Santa on his progress through North America," she said.
The tradition continues and NORAD trackers are finished for this year - he was spotted over the great wall of China, over Christmas Island, Vietnam, India, Afghanistan, Moscow, London, South America, and then Canada and finished in the U.S.
There are many articles identifying Santa's workload, speed, and route. The Atlantic narrows it to "Christian kids" - 526,000,000 of them under the age of 14 in the world. So he delivers presents to 22 million an hour. That's about 365,000 kids a minute, about 6,100 a second.
The dailymail.co.uk also has an article on the science of Santa - Mr. Claus will eat 150 billion calories in milk and mince pies. He will need to walk 1.3 billion miles, which is 54,000 times around the circumference of the earth, to work off the extra weight. More at dailymail.co.uk