As a high school junior in physics class, we were released from classes for Christmas break with a short scientific analysis of the plausibility of Santa Claus. I admit, slightly shamefully, I wish I had the personality to be able to come up with these because I really quite enjoy these sorts of reality checks. Alas, I did not come up with this one, but I repost it for your reading pleasure from another website, credited below:
No known species of reindeer can fly. BUT there are 300,000 species of living organisms yet to be classified, and while most of these are insects and germs, this does not COMPLETELY rule out flying reindeer which only Santa has ever seen.
There are 2 billion children (persons under 18) in the world. BUT since Santa doesn’t (appear) to handle Muslim, Hindu, Jewish and Buddhist children, that reduces the workload to 15% of the total — 378 million according to Population Reference Bureau. At an average (census) rate of 3.5 children per household, that is 91.9 million homes. One presumes there’s at least one good child in each.
Santa has 31 hours of Christmas to work with, thanks to the different time zones and the rotation of the earth, assuming he travels east to west (which seems logical). This works out to 822.6 visits per second. This is to say that for each Christian household with good children has 1/1000th of a second to park, hop out of the sleigh, jump down the chimney, fill the stockings, distribute the remaining presents under the tree, eat whatever snacks have been left, get back up the chimney, get back into the sleigh and move on to the next house. Assuming that each of these 91.8 million stops are evenly distributed around the earth (which, of course, we know to be false but for the purposes of our calculations we will accept), we are now talking about .78 miles per household, a total trip of 75½ million miles, not counting stops to do what most of us must do at least once every 31 hours, plus feeding and etc.
This means that Santa’s sleigh is moving at 650 miles per second, 3000 times the speed of sound. For purposes of comparison, the fastest manmade vehicle on earth, the Ulysses space probe, moves at a poky 27.4 miles per second — a conventional reindeer can run, tops, 15 miles per hour.
The payload on the sleigh adds another interesting element. Assuming that each child gets nothing more than a medium-sized Lego set (2 pounds), the sleigh is carrying 321,300 tons, not counting Santa, who is invariably described as overweight. On land, conventional reindeer can pull no more than 300 pounds. Even granting that "flying reindeer" (see point #1) could pull TEN times their normal amount, we cannot do the job with eight, or even nine. We need 214,200 reindeer. This increases the payload — not even counting the weight of the sleigh — to 353,430 tons. Again, for comparison — this is four times the weight of the Queen Elizabeth.
353,000 tons traveling at 650 miles per second creates enormous air resistance — this will heat the reindeer up in the same fashion as a spacecraft re-entering the earth’s atmosphere. The lead pair of reindeer with absorb 14.3 QUINTILLION joules of energy. Per second. Each. In short, they will burst into flame almost instantaneously, exposing the reindeer behind them, and create deafening sonic booms in their wake. The entire reindeer team will be vaporized within 4.26 thousandths of a second. Santa, meanwhile, will be subjected to centrifugal forces 17,500.06 times greater than gravity. A 250-pound Santa (which seems ludicrously slim) would be pinned to the back of his sleigh by 4,315,015 pounds of force.
From http://www.chainreactionbicycles.com/santaclaus.htm
My conclusion to all this: it's more plausible that God became man, remaining both fully God and fully man, and that a virgin conceived this child and gave birth to him, all throughout this process remaining a virgin, than Santa Claus existing.
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