PhysOrg.com reports that every Christmas, grinches present calculations that cast doubt as to whether Santa Claus could possibly deliver gifts to all the world’s good children – and still remain within the laws of physics. To deliver gifts to all who deserve them, they assert, Santa would need to move so fast that he would vaporise due to air resistance, be torn to pieces by gravitational forces or suffer other terrible fates we wouldn’t wish for Santa Claus.
You'll be relieved to find out that a team of four top researchers looked into the case and concluded: Santa can do the job and Christmas is saved! They concluded that Santa has an ion-shield of charged particles, held together by a magnetic field to solve the heat problem and its possible if he travels in more than four dimensions."
You can read the findings here: http://www.physorg.com/news2487.html
At the NORAD Santa Tracking Radar site you can track Santa: http://www.noradsanta.org/english/radar/index.html