How does Santa do it? Visiting billions of houses? Eating trillions of cookies, and not get completely bloated; wouldn't he explode from eating so much? Also how is it possible that his reindeer are not "diced venison off the runway." A physicist gives us the answer in today's Christmas Science Fiction story: Harnassing the Brane Drane by Robert Brilling.
To make better sense of this you may want to skim the wikipedia articles on brane cosmology and the Planck constant. I really enjoyed reading this story, especially after learning a tidbit more on brane cosmology and the plank constant.Also I found the book, Warped Passages Unraveling the Mysteries of the Universe's Hidden Dimensions by Lisa Randall to be very helpful.