THEORY #1: Santa is a demigod. Some claim that Santa is nothing less than a divine entity. Like other demigods such as Achilles, Gilgamesh, Hercules, Perseus, and Theseus, Santa isn't entirely human. As the offspring of some kind of mythical and powerful being, Santa possesses some kind of supernatural abilities that allow him to achieve these miraculous feats.

THEORY #2: There aren't many good children. A few people have even gone so far as to claim that there just aren't that many good children in any given year, making it a piece of cake for Santa to reach those few households who actually do have angelic children that deserve Santa's gifts.

THEORY #3: Teleporting Santa. Maybe Santa has the ability to just teleport from rooftop to rooftop in his sleigh. No need to travel the long distances from house to house, city to city, country to county... just instantaneous transportation to each deserving kid's rooftop.

THEORY #4: Time-Stopping Santa. All that teleporting could still be awfully stressful for Santa as he tries to get around to everyone before dawn. Another possible solution is that he just simply stops or freezes time that night so that he can make all of his deliveries without having to worry about anyone staying up late or waking up early.

THEORY #5: Santa's surveillance system. Along the lines of how Santa manages to keep track of all the naughty and nice kids, it's been suggested that Santa employs every technique from hacking into existing security cameras, to sending out spy drones, to hacking our Facebook accounts and reading our Twitter feeds. He may even have a computer than can read our minds!

THEORY #6: Shrink Ray. How does Santa fit presents for all the children of the world into one sack? It wouldn't be very efficient if he had to keep making trips back to the North Pole to restock, so some have suggested that his sleigh (along with a hot cocoa dispenser, iPod dock, speedometer, and GPS) comes equipped with a shrink ray that allows him to miniaturize all the gifts and bring them back to regular size before he deposits them under his tree. ALTERNATIVE SUGGESTION: It's also possible that Santa's sack has some kind of extradimensional lining, allowing him to store all the gifts (and more) inside a space the size of a sack in our dimension.

THEORY #7: Stardust Propulsion. While it's widely acknowledged that the Santa would need to travel at Mach 3000 (about 2.3 million miles per hour) to deliver all the presents around the world on time... and traveling that fast would surely create a few sonic booms that would keep people up at night (if not outright ripping the roofs off people's houses! ), some have proposed that Santa has harnessed some kind of stardust-powered antimatter reactor in his sleigh that allows him to travel fast enough to deliver all the presents without violating the noise restrictions that some communities have. This would mean the reindeer are largely for show... or perhaps just for local deliveries after the stardust antimatter reactor gets them there.

THEORY #8: Camouflage Suit. You may not think a big red and white suit would be the most subtle of fashion statements, but some have theorized that the reason why kids never see Santa is because his suit is lined with a state-of-the-art camouflage system that allows him to blend in with his surroundings. So even if your kids stay up at night hoping for a glimpse of the big guy doing his thing, he can just stand still and blend in with his immediate surroundings.