So every year, there are scientists and just normal people in general proving scientifically that Santa is not real, because if he were to deliver all the gifts himself he would have to travel so fast he would vaporise. However, one scientist claims that using relativity, Santa could comfortably get all the presents to all the houses within a single night.
Scroll down to the bottom of the page, where you'll find the article and the MP3 download.
http://www.cbc.ca/quirks/archives/06-07/dec23.html
This was something my Bio 30 teacher showed my class, I thought someone on NS might enjoy listening to it.