And why doesn't Santa appear to age despite being more than 15 centuries old? That's "our biggest clue that he does not work within time, as we know it," according to sources at the North American Aerospace Defense Command (NORAD) who have been tracking Santa since 1955. "His Christmas Eve trip may seem to take around 24 hours, but to Santa it could be that it lasts days, weeks or months in standard time. NORAD's Santa tracker uses a
ground-based radar warning system, satellites that normally watch for
missile launches, jet-fighter escorts, and digital Santa Cams positioned
at strategic locations around the world.